I think I’m losing my best friend :(

I have this one person who I consider my best friend and who I connect very well with. We became really close when I was Sophomore going through a rough time being a loner with no girlfriends. My boyfriend’s brother (who later became her boyfriend) helped me by introducing me to her and from there, we got along great. Everything was fine until last year, she got into beauty school. I mean... I was trying to adapt the distance in the beginning when she started because she told me that she has been incredibly busy when it came to her assignment. Eventually, I was fine and patient, focused on my bf instead and tried focusing on my own things too. We did get to hang out a few times, and exchanged a few texts. We used to go to the gym together but that didn’t last long :/ Now at this moment, I don’t really see her anymore or get a text from her :( She’s almost done with her time in beauty school so I hope things will get better again. I think about talking to her about my feelings with the whole distant thing but I don’t wanna seem clingy or weird to her. I get scared to talk about it with her because what if she never really values our friendship like I do or doesn’t see me as a close friend anymore? I know that there are other people that I can make new friendships with but I really suck at socializing with people, and I never connected with anyone so well other than her and my boyfriend. She’s the only girlfriend I really have :(