Have any of you had to do this? I made this good friend near the end of my first semester of college last year because I needed a new lab partner and she was a great friend but very manipulative and clingy and depressing to be around. Granted she had a lot of family problems but it was starting to be too much this summer with her wanting to constantly text since we don't live near each other (and I hate texting). We were already in a fight this past week after I started ignoring her and finally yesterday I had to tell her that we're done

I feel really bad but I just can't take it anymore, and I'm transferring so we're not even going to be able to be friends in the same way anyway. + I don't want to have to worry about having to be available 24/7 to text her back when she needs someone to vent to. It feels like kicking a puppy but she literally said herself that her happiness depends on being friends with me/anyone and I can not handle that kind of pressure when I have **** of my own to deal with. Many times I encouraged her to go to university counseling like I did and she refused. And I told her we could try things out again if we took a break for a few weeks and even after explaining how I felt she still acted like me needing a break was ridiculous and that she had nothing to learn. I do sympathize with her but it's no wonder all of her friends leave.
I don't think there's any way to go out of this not feeling like a piece of **** but god it can't be worse than pretending to act like the friendship is mutual anymore?