Common situation. I had a girlfriend for over 2 years, long distance and we would see each other during holidays or whenever we could. We got together when I was a junior and she was a senior so our first year we both were still in school, after she graduated she came and visited when she could (not often, due to work) and after I graduated I went there more often. But we went 5 months with no visits... and she lost interest and I found out it was because she had a girlfriend there (we're both lesbians btw lol). So we broke up in August, her relationship now sucks, this girl has cheated and they always argue so she sees the mistake she has made (ex leaving me for this other girl) And now she is coming to see me this christmas because she has realized she made a huge mistake...
So when you guys see each other again, I am sure the emotions will come flooding back, if they were true from the start. Good luck