Bf cheated.. sad & confused

So me and my boyfriend have been together off and on for about a year and a half now. By off and on I mean we broke up in November because he said he didn’t know what he wanted anymore.. and he was also talking to an ex fling, by talking I mean flirting and calling her beautiful and shit like that, which I found out about by him being distant towards me and him flipping out when I’d go to change a song on the aux. we got back together a week later, fast forward to the beginning of April, towards the end of spring break(senior in highschool) I flew to Georgia to visit my best friend. We argued the whole week I was down there cause he said I wasn’t texting him enough, in my opinion I was trying my hardest and I let him know that. I get back and he’s acting distant again. So he stays over my house and I wake up early the next morning and grab his phone, yes ik I shouldn’t snoop but you know I had a feeling, I find out he has a tinder account. I wake him up and throw him out of my house. the messages were sexual and there were nudes and he was trying to hangout with other women. I am madly in love with this guy so I get back with him... people at my school have told me within this past week they knew he had tinder in March up until today’s date... so I brought it up yesterday to him and he tells me I can log onto his tinder, which I did and it asks to set up a new account.. these people at school have showed me screenshots of pictures of him on tinder in March and in April. We are both seniors in the same highschool. We started as FWB and then started dating.. I’m going off to Spain for 2 months mid june.. I really don’t know what to do girls I need advice and just some girls to talk to ☹️☹️