How do i show her that i have changed?

Become active in her life, and sure she knows you're there for her. She needs to know that you're genuinly there for here, and not just because you feel bad about before. Even though you've been through a lot, if you love eachother enough, things can work. Just remember, actions speak a lot louder than words. Also, maybe explain to her WHY you changed, and what made you realize you needed to change. Address the issue in other words.

Through time and actions. Remember it could also be too late, so be prepared.

Listen, you may just be awesome friends and be real and keep it that way, sometimes marriage isnt the cure all, use your past experience to determine if you two will actually be a functional married couple. It sounds like you've had a tumultuous past together so be real with her and say it like it is: you will always be there for her and you know she'll be there for you but that is a lot different than being a happily married couple best thing to do is talk to her you'll probably both realize that getting married is easy it is the staying together and divorce that can be very difficult and expensive on a lot of levels. Keep being supportive of one another and talk you may both concede reluctance about marriage so there will be your answer. Good Luck!

dont give up..she will soon realized thta...she is just scared to trust you again...give her time..we, women easily forgive and that it will soon fade- the anger...
why dont you surprised her on her birthday or try to do something that she has been wanting to do..

she did not care for your love now time to show your carlessness

Dont tell her, show in your actions.

pls keep on trying, because even stones can dissolve when keep on trying........ my best wishes you will marry your ones.....

The only way is to put your pride down. I've been there, feeling good, and new and completely reborn, ready to try again BUT we often want them to be ready when we are, which isn't gonna happen every time. You have to let her be upset and scream and cry at you and rehash all of the old bullsh*t, even though you're not going to want to and it's gonna hurt and it's gonna embarrass you and all you really want to do is be happy...

I'm willing to bet, though, that the problems the two of you had before didn't occur when you were happy or doing well, but when one or the other of you were upset about something. So look at this time, instead of as a hardship, as an opportunity to do exactly what you're wanting to do, to show her you can take responsibility for the ways you've let her down in the past, to be there for her. Most women just want someone to listen...refrain from giivng advice or trying to justify the past. She doesn't want to hear it, you're not going to change her mind...just listen and ask what you can do to make up for it. And then DO that, whatever it is.