How do you get a person you love back?

You cannot MAKE someone love you.

You don't.

There's no guarantees that you can , of course - but how long have you been apart, and how and why did you break up? Whose choice was it? Have either of you moved on to other loves since then? Does she have a new sweetheart?

If she has someone new in her life, it's best for you to step out of the picture gracefully. Let her know - if it is true - that you are sorry that things ended between the two of you, and that you would like to see her again in the future if things change. Be a true friend to her, if she's open to that. But don't lurk, and don't hope for or try to engineer a break-up with her current sweetheart. That isn't the way a true friend would behave, and it isn't loving.

If she hasn't moved on, do the same, and be willing to be her friend if she is open to it. Can you love her as a friend if that's all she's ready for? Do you love her that much? Be available and supportive, and prove that to her. 

If she will not allow you to do that, move on. It's her loss at that point. I know that is hard, but doing otherwise will just cause bitterness.

Good luck to you. 

you can get someone back you love, hoping you never did anything bad to lose them in the first place, talk it through and do something special for them, if it doesnt work the first time, if at first you dont suceed, you know the rest

Can you make someone fall back in love with you? Of Course you can. But it's more about you than it is about them. If you were with this person at some point (not counting one-nighter's or short-term flings), there were things about you that made them fall for you and things about you that made them fall back. As long as those things don't include sleeping with her best friend/sister/mom, you should be fine. If you don't know what those are, you're out of luck.

 But if you do, then you have all the ammo you need.

If you are dead set on getting someone back, you must work as hard as possible to eliminate those habits or vices that got under their skin. Quit smoking, work out, go vegan, whatever. Also, try to enhance those parts of you that were most liked. Read more, save more, perfect that thing you do with your tongue...since you know this person, you know what makes them pay attention. Finally, talk to other women. Make sure you understand completely (from a female POV) how you got in in the first place, why you lost what you lost and how to prevent it. The best way to win someone back is to show them you've grown into a better option and if they'd only stayed a little longer, they'd have you.

Don't change who you are for her, but upgrade your status in her eyes. If the two of you were meant to be, and she hasn't completely changed as a person, she'll notice, and she'll remember that she had those great qualities of yours all to herself at one point. If she doesn't, it's win-win: you'll know that she's delusional.