Everything hurts

So my S.O and I have been together for about 3 years. He's the love of my life. Recently However I moved to a whole other continent to pursue my MsC and he assured me that everything would be fine, I mean after all it was only a year right Wrong. He has this thing where he would try to get to know new girls and they would have outings which seem very much like dates. He assures me he's just trying to make new friends but then why wouldn't he bring them around when all of us (I usually hang out with his friends and him vice versa) are together? Anyway things were really rocky because of this in 2017 and a lot of it seemed inappropriate but he stopped and we have had a great year. It's very difficult because on one side I trust him and he has never been caught in the act and sometimes I think I am just crazy. He told me this year that he would never do anything to risk losing us but he recently started hanging out (alone none of our mutual friends) with this model girl and she has been telling people he's been in her DM's doing the most and she's not interested.

I don't know what to do because cheating isn't the only thing that you can do wrong in a relationship and time and time again I suffer public embarrassment because of how he is with other girls. He knows this hurts me and I forgave him and now he's doing it again. I even found out by accident on social media yesterday that he drove out of town with her, her best friend and best friends boyfriend. Doesn't this seem double date-like? He hasn't been communicating well either,

What should i do? I need the strength cause all I do is cry now, I don't even eat and I'm too sad to do any schoolwork :(

UPDATE** He just told me that he doesn’t feel like talking to me and that is why he hasn’t been making any effort and that I should give him space. I asked him if he wants to be single and he said we shouldn’t talk about it anymore and left it at that😦🤭