I just need help letting go :/

Soooo I fell inlove with my now ex boyfriend not only because of his looks, but because of his great personality and his ways of treating a girl 😭😍 Always saying the SWEETEST things and being there when I needed him. But like I said, ex boyfriend. I've known him for 1 year now and yea we're on good terms I guess but I was semi close with him even before we dated which makes moving on even harder because our friendship, and the person he has been and become is the reason I fell inlove. I broke up with him because he kissed another girl while I was gone in mexico and denied it begging me to believe him saying he only wants me and he want to be with me. So, he is back with his ex and its been 13 days since we broke up. He has been on my mind a lot lately, I think I miss him. I miss the kisses he gave, the long late night phone calls, the times we laughed at the dumbest things, the times we made eachother smile, the long walks around school alone. His hugs, his smile, his laugh, his humor. He is just honestly perfect for me but he's gone now. And I didn't wanna break up with him, it was pretty much like I had to. But damn seeing him with his ex hurts, because not that long ago, that was us :/ I miss it all.