I (22/M) started dating my best friend (22/F) after things ended with my colleague (24/F), but my feelings came back.

About half a year ago I got close to a coworker in my workplace. We got along and spent a lot of time with each other. We both knew it wasn't going to be serious, but we cared about each other and eventually got physical. We had a few arguments and things didn't pan out and we stopped talking and eventually we drifted apart.

My best friend told me she liked me at the time. I liked her, so I agreed to a relationship with her. A few weeks later the senior re-entered my life. We started talking again and all my feelings for her came back. I didn't want to lose my colleague but I didn't want to hurt my friend, especially because she's a very sensitive person.

So I didn't choose, I kept both relationships alive. The problem is, I still have feelings for my colleague. I wait for her messages, I look forward to her calls and she is the first person I want to talk when something happens in my life. I care about my friend but lately I've been wondering if I'm staying because I love her or because I'm afraid to hurt her. I know I have dealt with this badly.

Honestly, my mind is confused right now. I realize I haven't managed this well and I'm trying to understand what the right thing to do is. What would you do in my situation?