I'm cheating on my long distance boyfriend with my friends with benefits

So me and my boyfriend are in a long distance relationship since 5 months, we haven't seen eachother yet, we met on insta through our friends matchmaking, we haven't talked since a month because he has his entrance exams, and a lot of things happened during that gap I met a new guy from my college and I felt attracted to him the first time I saw him, and he and I met in a group project meeting, he then added me on insta, I told him I have a bf, and yet he continued flirting, I was also interested in him so one thing led to another and well now we are friends with benefits, I have no regrets about what I'm doing, my boyfriend also has a lot of female friends and he sends snaps where he literally has his hands around their waist, and they are sitting on his lap, I had confronted him about this before and his reply is I don't trust him, yeah that's why I don't have any regrets about my cheating, I want to break up with him, but I don't know how to...?

Tldr: I am cheating on my bf,I have a fwb, he might be cheating or idk, I don't love him anymore, I want to break up, but idk how