What you've got to remember is the good times you had with her but just remember that shes an x...and x's are there for a reason, fair enough it hasnt worked out ...but please dont try and give it another go...you cant make someone love you again... what will happen is if she lets say for example breaks up with her new boyfriend she will use u as second best.
The best thing to do is keep your distance, and i know you've heard this so many times and its probably cliche to you but time is really a healer... give it time and i promise someone better suited will come along..
Trust me i know how it feels, i cryed for a good year over my x when he needed 'space' and then he moved on.. it hurts but u no wot ull get over it.. and find sum1 better suited to you and someone will not use you 4 second best.
New year , new vibe, go out there and do yourself justice ..
Goodluck , Soniya

x