Hi @Lonelyboy17
I can imagine how hurtful it can be when you feel distanced from a close friend. Friends are so important, I can't imagine a world without mine. It's great that you want to work through things and are asking for advice.
As you say, there are some people that just get a bit drained if they are around the same people all the time. So perhaps just give her a little bit of space. Not too much that you become more distant, but just enough for her to notice that she misses your presence in her life. So maybe like a day or two.
Or you could consider that perhaps she is experiencing some problems in her own life that are causing her to act a bit different. In that case, just be a supportive friend. Show her that you're there for her if she needs any help.
Let me know how things work out. Good luck!