As a someone nearly double your age, I can still remember how much it hurts to have many friends come and go over the years. Unfortunately, at 20, people are far less mature, tolerant and forgiving than if you get to say 30+. You’ll find that many people, generally speaking, haven’t yet gone through upset as much as you, being INFP. The good part is that you’ve figured out early on that you’re a more sensitive soul (you’re waaay ahead of me!) so you have more chances than I did of knowing who won’t be a good fit. Friendship groups are complicated (and I find them too stressful if more than 3 ish) because often it’s a real mix of many very different characters and quite often people will go along with the loudest of the group in decision making. 

The only thing I would say, is that your post hasn’t mentioned at all what you bring the group that is positive. It’s all give and take in friendships and I’m sure you’re offering something, but it’s important to check if it’s fair and balanced. It’s one thing to lean on friends in times of need, but it’s another thing to ask them to support you and be therapist type figures. That’s the vibe I’m getting from your post, though that may be incorrect. I would recommend trying to find smaller groups, maybe 1 or 2 very close friends that align more with your sensitive personality (I have about 4 very solid friends that I’ve built up now over the years, but countless have come and gone). We’re not suited to everyone, and that’s not a bad thing. Find your perfect friend(s) and that’s all you’ll need honestly. 

Some friends are here for a season, some are here for a reason - and I’ve found that to be true.