I wish i could be one for just one day just so i can understand them!!

Me and the missus have been seein each other for 15months and we broke up the other day, mainly its my fault, she thinks ive been cheating on her, which i havnt but i have given her good reason to think i have
Thing is though weve had up till now a fantastic year, a brilliant holiday, its just gone down hill the past few weeks...
shes told me she still loves me we cant speak on the phone coz we both end up crying just hearing each other speak, we cant text each other coz it ends in arguments (my texts always sound nasty even if theyre not) I truely love her but i know she wont see me. I dont wont to hastle her either, i only want her to be with me if she wants too.

I really dont know what to do, the thought of her being with someone else makes me sick, and i cant even imagine seeing someone else myself

What you guys reckon coz my head is fecked