Best friend since kindergarten decided to stop being friends

For context, we’re both 19 and have been best friends since kindergarten. We’ve never argued, clicked pretty well, and could always help each other out. After high-school; we slowly stopped spending time with each other in person but always stayed in contact here and there. I got a boyfriend after my senior year, who I am still with, and he dated girls here and there. This past year he’s kept a relationship but almost every month, there seemed to be an issue. It always seemed to work out in the end, but now finally, he decided to stop being friends with me for good. I don’t have a lot of friends, and he’s been my real genuine friend for a long time, so this one kind of sucked. Girls in the past have had problems with our friendship as does this one, but I always tried to be genuine and trustworthy. The last thing I wanted to was to appear as this sneaky “best friend”. I’ve offered to do double-dates, or just to meet each other to show my honest intentions, but it always fell through or didn’t happen. I wish I reacted more maturely, but 10+ years down the drain is upsetting me a lot. Has anyone else had a fallen out like this? Is it normal to feel this way?

I don’t use reddit a lot, so i’m not sure if you can attach photos. But most of the messages went like this:

Him: Okay so i've tried like staying friends with you with like all the relationships i've had and no bueno everytime it like leads to suspicion and not believing me like idk bro i wanna stay friends with you but do you think it will be better if we just like pretend we don't fw each other so our relationship with our partners get better because every month it leads to arguments about like you and me. I need help

Idk like i've tried with like every girl and maybe cause my past too she is like kinda cautious and stuff and it just happens like everytime it's not your fault at all I don't want you to feel like that it's all mine cause the person I was and stuff

Me: i don't know how else to prove that i won't do anything even though that’s not really my responsibility

Him: ik you shouldn't have to i'm sorry too it's like all on me and im sorry like idk what else i can do

Me: but there's only so much i can do as well. if you feel like we shouldn't be freinds because of your girl, or past relationships, then that's your choice to let them control your friendships like that.

Him: I know and I don't want that for you either i respect you and our friendship to much to like do that i'm sorry but I do think it will be better for our relationship to go our separate ways. Bro but our streak was crazy (this is about tiktok. this kind pissed me off because he really cares about a tiktok streak rn?)

I just responded with Alright. And he said “I don't like don't fw you or anything you have helped me with so much bro i'll always be here if you need anything just call me if anything”

To which here is where I wish I was more mature. I said

that won't happen, you expect me to call you after this?
you say you respect me as a friend, etc, but you're letting this stuff control you
if you both can't keep friendships of the opposite gender; neither of you are faithful
i hope it works out between you two.

And his last message was he wished the same for my boyfriend and I as well. Then he removed me on all platforms. I’m not sure if i’m blocked or not.