I don't know what to do

So I recently started college hours and hours away from home. I use to be extremely social and made many friends. I haven't made more than 3 friends here. I get really lonely and life was hard. I did have my boyfriend tho. Except when we finally had sex for the first time after dating for 5 months her totally ghosted me. It was consensual but the fact that he stoped talking to me right after has scared me . The last thing he said was I love you . Talk to you after your class... that week I saw pictures of him with another girl. That was a month ago. It makes me so sad. I don't have many people to talk to. My friends I have made think I'm over it . I'm not it really fucks with a girls mind.. I don't know what to do anymore I'm so stressed and confused