my bf (23M) has a questionable relationship with his (20F) coworker?

my bf and i (21F) have been together for 3 years and 6 months. worked through hell and back to get to where we are and i was kinda surprised to learn what was going on at his warehouse job.

my bf is this very shy, very friendly person (maybe too friendly). he works at an amazon warehouse at which i recently applied and am working at as well (not because of the situation). my bf comes to me one day and says that somebody at work, a guy named francisco, came up to him asking questions about if he was single, how long have we been together, all the extra stuff to which my bf replied and said how long and all that stuff as well as saying that i was starting work there soon. francisco told him that it was because it was the girl in the blue shirt asking. days later he comes back and says “she was asking that when are you taking her out for dinner?” to which he replies i have a gf i don’t want two i only want one person and that he isn’t going to do that.

a couple days later my bf starts a conversation with her about work, eventually he starts asking her about the things francisco said, that he told me this and i’m wondering why u said that. to which she proceeds to say “i never said that he twisted my words.”

my bf likes to trust in people he thinks he’ll have a good friendship with, he then says i trust her and i don’t care what the guy said and i’m not asking him because he’s starting problems, i told him you have to hear both sides to be able to debunk what she said. he doesn’t end up asking this guy and eventually starts this friendship with this girl.

at the time, he was also looking her up on facebook, he found her account but i didn’t think anything of it, he had also found her instagram some day later and didn’t tell me until after everything happened. i eventually blocked her facebook, he said why, i said bcz she will come back looking for you, she wants to snoop around he kept saying no she won’t, couple days after they’ve been talking he tells me, she asked me why she couldn’t find me on facebook and he had told her that you blocked her and she said “it’s understandable”

same guy comes back because he’s still friends with him, he says “mira se está ahogando” to them meaning “look at her she’s drowning in love.” and then also tells him, she got broken up with a week ago, making my feelings explode, giving me anxiety, crying all the time.

they talk for a few days, he tells me he talks about me and every time he brings me up, she gets silent. she tells him i like you and he has this huge reaction that because someone found him attractive and he hasn’t felt that in a while and doesn’t know how to feel or what to do(that being the adrenaline rush). i tell him well i don’t want you talking with her anymore and proceeds to tell me that it’s just his friend. i set boundaries because at that point this situation was being brought up almost every single day because he wants to hangout with her so bad. i said i don’t want you talking on any social media, no hangout outside of work, and no exchanging numbers, you can talk at work IF they put you together because i understand work and you not wanting to make it uncomfortable, he says he understands but then sometime later starts picking at the boundaries and says “i want you to trust me because i’d like to hangout with her.” we don’t reach an agreement and as he continues to pick on the term later on, i start feeling anxious, i start feeling like i am slowly going insane because i don’t tell anyone due to the fact that it’s kinda sad and embarrassing that this situation is still continuing like this.

we talk about the situation, this time when my best friend had come over, i talk to him in our room since it’s a bit more private, he’s bothered, i can tell, i ask him what’s the matter? he says i think i want an open relationship, we have a whole discussion and it gets no where and told me that he likes her, so i give him an ultimatum. “if you keep talking to her, we are breaking up, im done” he said that he never wanted to break up, he just wanted to hangout with his friend. he doesn’t listen and then still proceeds to talk to her. the night we had the argument i put a evil eye bracelet and a necklace of a certain saint, the necklace blessed by the church and the bracelet blessed and prayed over a good friend of mine.

next morning when i pick him up at work, he stares at the necklace and says i guess it worked. he tells me they talked about maybe they should stop talking because she wants it to go one way and he just wants to “hangout” and she now supposably cares about the fact that it’s hurting me and that she understands how that feels but then tells him “but again it’s your decision” we have a whole breakdown at home but then sat and talked it out and are working everything out as i type this. he still wants to talk to her on thursday to get “closure” and to cut everything off, but he wants to tell her about the fact that he’s changing his schedule (he’s changing it to mine so that the “temptation” isn’t there anymore) i said there is no need for her to know what you are doing because it isn’t any of her business. but so very much insists that he should so that she doesn’t have to worry anymore either.

i love my boyfriend so very much, we’re doing great trying to move forward from the situation we’ve even talking about maybe getting married in the nearby future. im trying to listen more and become a better person cuz i feel as though me not listening or being to scared to do something may have started to drive him away and he is doing the same, i feel that this was also an eye opener but i don’t know; i want it gone, but he still wants that closure?

so that is where we stand right now, someone please help me try to get him to understand that it’s not right or if i’m the one that isn’t making sense, i’m just confused and we still pick at this ridiculous situation and i kinda just want it gone. someone help, please ?

TLDR: my bf heard about how a girl was feeling about him, he talked to her to see if it was true, they started talking i got insecure and told him but he didn’t really understand that it was because he was acting weird the entire time they were talking, now he wants closure and i don’t think it’s necessary.