Welcome back, it has been quite a while.
As a single person talking with those whose lives are on a different course at the moment frankly I would expect things to drift apart a bit. I'd expect they would be looking to settle down.
Friendship is a funny thing, and can exist underneath without it coming out in everyday actions. I've rejoined with friends after they have married and had kids who are now grown, and that has allowed the old relationship to reappear almost as if I was resuming a conversation broken off years ago.
Before I'd thought the friendships just about over as we were all bound up with our own separate and demanding lives - myself included.
Please excuse me for saying this but reading of your troubles 8 years ago I'd be surprised if you were not somewhat sensitive over relationships, it would be only natural. You had parents who broke up, a toxic mother who tried her best to break you up wiht your girlfriend and overall the path was tough, particularly as study was very taxing and money a worry, as was accommodation.
Add to that your recent rough breakup and those friendships might loom larger in your mind.
Do you mind if I ask if you are alone, or is there someone in your life you can lean on at the moment? I'm unsure of your relationship with your dad, might he be understanding?
Following a permanent breakup it is often a good idea to resume a more social life, even if one does not feel very much like it. You meet new people and may find other interests too.
Do you think the above is a realistic assessment, or am I missing things?