<human>: Can you condense the text into three sentences or less?

I don't want to make this too long, but basically I had some shitty friends in my younger years (all through K-12), and it was only in college that I really made some good friends. I had to transfer schools because of academic reasons after 2 years (switched majors), and as a result I lost some friends because of the distance.

I feel like as a result of the shitty friends when I was younger and some of the friends that lost contact after I transferred I'm very paranoid about my friends not liking me or just pretending to be friends with me. There are very few close friends I don't have this worry about.

Recently I've been worried that a friend I've made about 6 months back through work doesn't like me anymore now that she doesn't work with me anymore. But in reality I think I'm just getting insecure about the friendship and ruining it myself by becoming clingy and overthinking it.

Why am I having these issues even now that i'm older? How can I stop ruining my friendships because of the things that I'm most likely just making up in my head? How do I know if these people actually don't like vs me just being paranoid?
<bot>: Shitty friendships in the past have made me paranoid about people. I feel like this has led me to ruin my own friendships. Very recently I think I've been pushing a friend away with this insecurity.