Hi! Your situation is both different and similar to mine. What I can advise is to give things time and keep the lines of communication open. Maybe find out where your GF is at...how is she feeling...does she ever envision or want more time with you? I believe in always being open and honest, but you might want to tell her your feelings with a caveat...like "I don't expect you to feel the exact same way but I wanted to share with you what is going on in my head". Love can be tricky and sometimes painful. I have so far experienced that it is very hard to get all the time you want with a secondary, and there is a lot of negotiating and compromising. Most of all...give things time. With time things come into perspective.
Best of luck!