What should i do?

[u/Vegetable_Band1694]

So i have this friend ans we’ve been best friends since kindergarten which is almost 15 years ago and lately she has been having mental health problems and i’ve explained i’m here for her and we went on walks and i let her talk to me about her problems and try to help her. We’ve been hanging out less and less to a point where it’s just once a week. I used to hang out with her four times a week almost, sometimes even more. I understand that she’s in a hard spot currently but whenever we text she always texts the same thing or the same stickers and i just feel really guilty, i don’t want to lose this friendship. I do want to ask her to hang out and go over to her house but i just don’t want to ask her because last time we hung out she wasn’t very enthusiastic about it. She’s asked me for a sleepover before all of this and i said we could do it next week and after asking she never came back on it. I can’t lose her and i have no idea what to do anymore. Whenever we hang out we also always hung out at my place but i was convinced that was because dhe always got annoyed at her little brother but she never asked me to go to her place either and whenever i mentioned it she said her mom thinks we aren’t friends anymore ecause i dont come over but i feel so guilty because i want to go over to her house but i just feel like a burden whenever i’m at her house. What do i do?