Boys 🤦🏻‍♀️

Okay ladies!!! This is my first day on here and I NEED SOME ADVICE! So basically, I have very strong feelings for a good friend of mine. We hooked up a few times, talk everyday, and hang out multiple times a week, however he now has a girlfriend. I can tell that they are crazy about each other (which is great because I love to see him happy), but now I just don’t know what to do. I went to their Christmas party on Saturday and is physically pained me to watch him kiss her, hold her, etc. because I like him so much and I wish it could be me. Any advice?

P.S: He doesn’t know how I feel.