Well, I've been told from when you aren't strong enough to get over someone...delete her number (i'm sure you have it memorized), block her number (you won't want to thou), change your number (but then you have to wonder if she ever tried to contact you), but, honestly...you can be the ONLY ONE that can decide to get over her, and it will be hard. It sounds like you are madly inlove with her, but, I agree with some of the others, because you are still young, never married, don't have kids, she's done all that, and she is 16 years older than you!! -she could be your mom! (a young one lol)! However, I've been told love can happen no matter what someones age...most I've dated younger or older is 5 years difference.
In my opinion, I think you should move on. But, whether or not you decide to do it is your choice, and only YOU can make that choice. There is someone out there for you, and it might or might not be her--but maybe time will have to just tell, for you to see who that special person will be in your life. Oh, and her staying out for hours...she's running away from her past or something, and you can't stop her or change her ways. I'm 38 with one kid, and I can barely stay away past 11! At her age, not sure how she does it, but I've went back to drinking sometimes when I'm depressed or smoking (cigs nothing else lol) when I'm depressed--its an outlet or crutch for me, but maybe that's the only life she knows. You need someone that won't be embarrassed to introduce you as their significant other, and I would bet your age has something to do with that. Not for sure thou. I do wish you the best, and try to follow what will truly make you happy....some quotes for you.
Relationships are like glass. Sometimes it's better to leave them broken than try to hurt yourself putting it back together. ~Author Unknown
“Don't be reckless with other people's hearts, don't put up with those who are reckless with yours.”
“The human heart feels things the eyes cannot see, and knows what the mind cannot understand”
“The heart is forever making the head its fool.”
“Until this moment, I never understood how hard it was to lose something you never had.” ***(has she ever been truly yours, or did she throw away the key to her heart long ago?)