if youre going to text her at all just tell her you arent mad, and if she wants to contact you in the future she is open to do so.
just relax man, get some buddeis or just go do things you enjoy to do, or even try new things. like maybe try an autocross event, or rock climbing, or kickboxing, or if you arent into sports, maybe learn somthing new like how the stock market works or go paintball or somrthing.
i broke up with a girl a few years ago and she got into some trouble with a guy and she felt she was in danger, and it killed me when i found out she didnt think i would do anything if she called me, or i would even answer the phone.
but thats a bit of a different situation and the point is, i think if you are going to do anything at all, make it not to sound like you are hurt, be strong and firm and tell her if this is the choice she makes that maybe she will be happy with it.
if she comes back thats cool but man you will be ok with it. every day will be al ittle easier, every day you will think of her a little less.
the thing you need is a new girl that is a friend, and will help you get a new chick. now i need to be clear about this, if you go crying to your ex, and keep communication open with her frequently, she will try to make you her friend, which is the same thing as being her girlfriend but without the sex. this is the last thing you want, cause then you will watch her date new guys, and that will hurt.
you need to find a nice girl that knows you enough to trust you, that you can talk to and get a different perspective, maybe even some comfrot from if thats what you need, and eventually can introduce you to a new girl. girls trust the opinion of other girls. they trust each other.