Most Helpful Guy
I know exactly what you are going through.
I went through this with my ex. We were madly in love and would always tell one another how much we loved one another. After almost 2 years together we hit a point where we didn't have time to always be with one another. We had like one hour of time to ourselves. I hit the point where I realized it needed to change and I was willing to do something to make it worked. I had told her my intentions of asking her to be my wife. One day she told me we need time apart. I didn't understand, I sent her messages from time to time asking what was going on and why she ignored me. A short time later I found out she had been with someone else and she didn't want me to know. We finally talked about it after I found out and she gave me the line that I deserve better than her and I could do better. After that we tried to remain friends but every time we spoke I got the impression that she didn't want to actually talk to me. Eventually she stopped sending me messages. I haven't sent her anything anymore. I look at it as I was ready to commit my life to someone I thought the world of and they couldn't even tell me when they no longer wanted to be with me.
I think moving to London is a great idea for you. I went from California to Michigan following what happened to me and it was just fantastic. It was exactly what I needed. I think a fresh start and the chance to meet new people without constantly being reminded about that is what you need.
There are people out there who have had to deal with things like this, I admire you for being honest and mentioning all of this. If you ever want to talk about what happened I would be willing to listen and try to help.