<human>: One of my good friends since middle school has grown quite distant over the past year. This change comes after we lived together as roommates for two semesters in college. We had some disagreement, but nothing so major it ruined our friendship. We always remained on good terms, with her admitting that I had so much influence on her over the years (and I can say the same for her when it comes to me). 

She is always happy to see me when we do end up hanging out, but I feel like I'm constantly pulling strings when it comes to solidifying plans with her and instances of us hanging out are becoming less and less frequent as time goes on. She rarely responds to texts in a timely manner (I'm talking days later), if at all. I don't text her that often, maybe once a week. 

This week I texted her that it would be cool if we could see each other soon since she graduated from college a couple weeks ago. It's been days and still no response. 

I'm not the only friend she's flaky with. My SO and another friend of mine are also friends of hers. They also have said she doesn't reply to texts and she has canceled plans last minute several times. She has done this so chronically that we kind of expect this of her. The main adjective that hangs around mention of her name is, in fact, "flaky."  Mysteriously, she always has time to hang out with her boyfriend and one other friend. She is texting them even when we do hang out. She is the type to ignore her friends in order to spend time with a boyfriend.

Also, she lives right down the block from me. It's not like it's a major inconvenience for her to stop by and see me. It's been a month since we've hung out. Am I right to question the validity of our friendship over this or is this simply a part of "growing up"? We have so many memories together from our high school days.

Can you summarize the given text in a few sentences?
<bot>: childhood friend constantly cancels plans last minute and doesn't respond to texts with me and mutual friends. Now questioning the friendship.