I think I am jealous of my fwb

Hello Reddit, I F24 have been single for almost 3 years at this point and up until last month I hadn't had sex for a year and a half due to bad experiences with the last man I was with and it left me not wanting to get hurt again.

Well I have known this guy since july of last year and he is physically attractive and he was clearly interested in me; therefore, I decided to give him a chance and have something casual with him because at the end of the day I am young and I felt like I was wasting time by no enjoying sex. At the beginning we talked about being fwb and there was no talk about exclusitivity, ever since we have seen each other 2 or 3 times per week and every time we have sex (at my house as I live alone) then we talk for a few hours and the he goes home. Also, we text everyday.

Now to the actual problem that happened yesterday, we were chatting on WhatsApp and he has told me before that he wants to have sex without a condom and I told him that I would only do that if we were exclusive and yesterday he brought up the topic again and I reminded him of my conditions to do it and he dismissed me meaning that he wasn't willing to it, ok no problem. Then one thing led to another and he ended up sending ME a screenshot of a girl that had asked for his number the day before that had actually texted him wanting to meet. I don't know why, but that made me extremely mad or jealous, I don't know, and I didn't answer anything and he texted me asking me if I was mad, but I haven't answered anything just yet. (At the beginning when I told him about exclusitivity he told me it was a good deal and yesterday he dismissed it clearly because this other girl showed up and he wants to do her)

Since yesterday I have been trying to understand my reaction because it is not like I am in love with him or anything like that, but just the real possibility of him having sex with someone else makes very very mad. I have had my problems with no exclusitivity in the past and I just think that I am wired only for monogamy, but at the same time I want to keep enjoying sex and I wouldn't like to start over with someone new. I just need help navigating this situation, what can I do? Should I just end things?

I plan on talking to him today and clearly stating that I don't want him to show me stuff like that ever again and that I know we are not exclusive, but I still deserve respect.

Please be kind in the comments, I know that I got myself into this.