Is OTHER wrong in the post ? POST : So long story, and sorry if my grammer or punctuation is messed up my keyboard sucks on my phone. 
Anyway i (16m) dated a girl (15) (we will call "K" for the sake of the story)  for about 2 and a half months 
And i was already in love so much she was amazing 

And for those reading you should know im a introvert and i have a very hard time making friends and especially ones i can talk to about anything or have some kind of connection with 
Let alone a girlfriend, a lot of problems i have making friends comes from stuff that happened in previous friendships and relationships)

Anyways everything was all good we was both really happy and talked all the time 
Then one morning i messaged her and never got a answer, figured she was busy so i waited, and waited and waited, Eventually two days later i figured she was done talking to me and moved on to someone better or something 

Well time goes by couple years later (im now 18, her 17)  we end up talking again and get together  and the same thing happens

I have had relationships end this way so many times just end up being ignored and never hearing from them

Well couple more really rough years went by im 21 now but thus happened around 10 months ago while i was 20

"K" ended up messaging me on Facebook with long appologetic message saying how she felt horrible and shes changed and wanted to apologize to those she wronged
And mentioned how she had a boyfriend and being happy just made her feel bad for those she hurt

Being that i had a bad year and a really bad day 
I told her i forgive her but i cant talk to her cause i was tired of trying to have friends or even just talking to people and keeping in touch 
It was hard at the time talking to anyone and still is 

But i felt so horrible for months cause i hate sounding or being mean honestly 

So i end up messaging her about 3 or 4 months ago and apologizing about it and we get talking 
And we connect so well again talking about everything within a few days she starts calling me and we talk nomstop for hours on the phone 
She texted me all day everyday for about a month and i was falling for her once again 
The first time in the past couple years i had a friend i connected with and felt like i wasnt alone for once we talked and talked over the time that went by she was flirty and i didnt start till she did cause i didnt want to assume she was wanting to get back 
But things kept going and i eventually confess how i feel thinking and hoping she felt the same and i waited for a reply for hours and when it finally came 
My heart sunk seeing the first part "your such a wonderful guy and i love that your in my life everyday but.." and so on and told me how she was still with her boyfriend 
I accepted her answer and said okay and moved on, or so i showes on the outside on the inside i was upset so bad i mean why would she flirt with me and talk to me almost 24/7 and never mention her boyfriend until i confessed how i felt? It felt like i got led on honestly..
Well a day or two later she called me at midnight crying confessing how her boyfriend treats her and (i wont go in to too much detail cause the story is already long) but she lives with him and his mom and she told me about how they emotionally abuse her daily 
Some of the things she said they said was just fucked up in my opinion 

And she was asking for advice
And it may seem like i could be biased here but i swear when she called me crying i didnt think about how i liked her or anything that would be biased

And i told her how it was not a healthy relationship and i thought she should move back in with her parents cause it could only get worse

But i had a hard time thinking of what to say best i could do was sit there and talk till she calmed down because i was trying my best not to sound biased.
Well after that we kept talking as friends but slowly declined and now she doesnt message me at all or nothing i dont bug her or want to 

Anyway thanks for those who stayed till the end
And what do you think am i a asshole here? 