looks to me that she has resented her honourable decision to commit to looking after you and started to resent the fact that her mates are all going out drinking , chasing boys and generally having a good time while she is stuck with you , there is nothing more fickle sometimes , however , you are looking to be a bit more positive about yourself , which is good , you are the important thing here I wont use the old cliché that life goes on , at her age she probably would be too young even to know her own mind , I would forget her mate , very difficult I know , I still suffer from the first real love syndrome on occasion , it has been more than ten years on that one for me , still it haunts , I have however got a decent one now , sure we have ups and downs , but we blunder along , if you will forgive the bluntness again I would do the following .
1 change the locks on the doors .
2 separate accounts asap and don't tell her
3 bag all her remaining stuff and dump it on her doorstep
4 cut her dead as she is just messing you around emotionally
5 if you are daft enough to meet for a "chat " do it on neutral ground so she cant use the sex bribe strategy .
6 find something to occupy your time , hobby , volunteer work , the gym , just get out and not let yourself brood
7 don't start drinking , and get your health together
again sorry to have not missed and hit the wall but that was the advice a good and long standing friend gave to me , take care of yourself , and again it is you that matters most , all the best , HBD