my friend and i graduated from high school in june and we’re going to different colleges (they’ll be across the country). we’ve been friends since 6th grade and though we don’t talk online much, when we were at school we had a lot of fun memories in person. i remember them saying that we should hang out more this summer before college starts over a month ago, but now that school is over we tried to make arrangements a few times but they’ve so far all fell through. 

lately i’ve tried to ask if they’re free, but they’ve been acting unusually distant and giving one word responses and i’m starting to feel like i’ve done something wrong. i get anxious every time i try to ask them now because i feel like they’re not really interested anymore or i’m bothering them, but i think about last time i saw them in person back in graduation and they were talking about wanting to hang out so while i’m hesitant with reaching out, i don’t want to drift away either. this is probably the last time in a while we’ll be able to see each other. 
they do have their own mental health struggles so it could be they’re going through a rough time and have little energy to talk, but i’m also worried i might be the problem (although we haven’t really caught up so i don’t have any ideas on why) or if i can be of any help to them. does anyone have advice on if i should ask what’s up or if i should give them space? i am conflicted on how i should handle this or if i should leave the situation alone, especially with one part of me that always tells me i’m a bother or am pestering if i keep trying to reach out.