I reckon mate that if u havent cheated on her, then until she beleives that 100% then u gonna have ur work cut out in making things right. Dont have arguments over texts coz txting is one of the worse things eva invented in respect of relationship woes. U can gaureentee if there a two ways of understanding a text then the other person takes it in the way that it will upset them, even tho u didnt meen it to. She wouldnt say she loved u still if she didnt meen it mate so u have something to work on. Its when one person falls out of love with the other that u will b in bother. See if u can get away for an evening or w/e (no not a dirty one b4 the comments start) and talk it thru. Get all the little niggles out in the open, and try and sort them 1 by 1. I could go on and on etc coz i have been in the position that u have been in.

And in answer to ur 1st statement bout understanding women. u wont.

Good luck