I dated a girl like that back "in the day" (80s). It was maybe 3-4 months total, though. She was "fun" but had some health issues and lots of friends who would all get themselves in trouble from time to time.

Like the prior reply says - don't trust her. You have to understand that putting yourself so into relationships isn't fair ... to you. You have to let your mates earn your trust. She sounds like she never did but in fact used you for money and other things. Sounds like she may have lost her bf at the time and started texting you and maybe others to try to establish the next guy in line.

You don't want to get hurt? How about thinking that someday, you guys would have children. What kind of life would they have to endure as well? So, you have to actually think of your "future" self when choosing a mate - not just what it's like to be with her day to day.

I would say - you can use this as a learning experience but I would strongly warn you against continuing with her. This is a big planet and you will find a life-mate out there somewhere. You do have to hang around in places where people who you want to meet are. This may include Church (and partcipating in church group stuff), school (you in college?) or other hobbies which are healthy and hopeful.

There are a lot of people who will have a hard time with life - so be kind to yourself and let life be kind to you back. Consider your options with a clear mind and don't let familiarity "rule" you.