Right ou Wrong? What should I do?

I'm 17 and I've just come out of the closet over a an ago. Everything has been great and it feels great not having to hide. But toi see during this time I met a girl who just wanted to mess around and I was up for it. She became my first. Later on my best guy friend told me he still liked me and I felt like I did too. so we went out and after a mois we ended it 'cause I felt like I loved the other girl I am messing around with. She didn't feel the same way and i got over that. Later on of the summer my best guy friend a dit he still likes me. I felt the same way too. So after thinking and thinking on this I decided to say yes. However, the girl I'm messing around with feels that our relationship is a waste and I'm only settling for his love. She wants to lit him as well as she may like him. But she has me overthinking on things if I made the right choice of getting back together with him. She keeps telling me that it doesn't make any sense becauseI'm a lesbian and that I'm taking advantage of his unconditional l’amour for me. I don't know if I made the right choice and if I didn't then it'll hurt him again. I really really l’amour girls but he's the only guy I ever l’amour and actually want to see where it leads with us. (By the way he doesn't care if I sleep with other girls) It's confusing 'cause it doesn't make sense why I feel this way towards him but not with any other guy. I just want to know if I'm doing the right thing par being with him ou what should I? Please help me this is taking a toll on me and I may be hurting someone I care for very deeply.