How can a girl make her best friend fall in love with her?

Well as hard as it is to understand love, you cannot "make" anyone love you or anyone else. If your friend is in love with someone else there is nothing you can do to change that. Being friends with someone you have feelings for and want more from can be very hurtful. At the same time not talking to that person anymore would hurt too. You're in a very tough position. Really all you can do is be a good friend and wait to see if her feelings change. Don't put your life on hold. Get out and live your life! Good luck to you! I have been in that position before where my best friend fell in love with me, and I liked someone else, but it turns out that I really did love him, but I just didn't realize it, and he didn't tell me until the last day before he moved 400,000 miles away. What I would suggest, is to tell them how you feel, and see what she thinks, if she still loves her boyfriend, don't give up, just put that part of your life on hold. Eventually she'll break up with her boyfriend, and you can try again! Hope this helped!