People do change and people can work out. Like I told you before though, it just seems that she came back for all the wrong reasons. The reality set in again and neither of you were ready to handle it.
After everything you went through, after all the talking to we did with you, why did you think just walking away and shunning her would be the right move to do? I used to do that all the time and I really got on my ex's bad side very fast. If you guys are both madly in love, why are you turning your back on them? Just a few questions to mull over.
I know you are 18 and young but if you believe in something and want it to work, you wouldn't be acting like this.
Waking up next to a beautiful girl,
Step outside and say hello to my beautiful world.