I wish letting go was as easy as some of you keep telling me to do, she's still going to most likely see this guy, some guy i dont even know who yet i'd love to sparta-kick into a big giant endless hole in the ground, yet still goes on and on how she does love me, yadda yadda yadda, apologizes for it all, and ya know, its funny, cause i'd love to reply "well if you did love me you'd get running around behind my back" but im not the angry type in these matters, doormat would be a better term if you had to label one i guess.
I've had similar feelings, so I'm going to chime in with some actual useful advice.
First of all, don't hate the guy she's with now. He most likely didn't know of your existence or she told him she didn't feel that way about you. More importantly,
HE isn't the one who hurt you. Yes, he has something you want... but he's not the enemy.
She is.
Secondly, when she tells you that she does still care about you, she's not lying... but she doesn't have the same definition of "caring" as you do. She cares about getting attention from you... she cares about getting your sympathy... she cares about having a back-up in case things go wrong. You need to understand this: To her, you are a pet, tool, or toy. To her, you are merely the means to get what she wants and then she'll put you right back where she found you.
Do not let her do this to you again. If she starts fishing for the old stuff again, cut her off.
Thirdly, you need to realize that's its OK to still care about her. She was a big part of your life for a long time. However, you do need to separate yourself from her or the hurting will
never stop. That doesn't necessarily mean that you need to cut yourself off from her completely (though if you can do it, I highly recommend that you do) but you need to limit your contact with her. If she has a blog, stop reading it. If she keeps trying to talk to you all the time, tell her you need some space from her and that you'll talk to her when YOU want to. The less you know about the details of her life, the better off you'll be in the long run. You'll eventually reach a point where it's OK to be around her in short doses or know for sure that you can't. If you can't, tell her your done and walk away.
Finally, my most important piece of advice: When you meet someone else, do not compare how you felt about this woman who wronged you to how you feel about this new person (Unless it's to say "Wow, she is MUCH better than that other bitch.") First love is often very intense and it's not often you will ever feel that way again. Don't think that just because your not full of all consuming passion that this new person isn't as good.