just be straight up n say i love you and ill always be here waiting
Don't do it by text message during an argument. That didn't help anything :~
let her know you care but try not to freak her out by saying you can not live without her or the like let her know she matters to you even if that means goodbye
i would just let her know that you love her and then try to move on, and i know thats hard but if shes not coming back then i suppose you have to..
honesty is always the best policy, no matter what. nothing is better than just letting her see that you are vulnerable. but if she says no, then let it go, it wasn't meant to be.