<human>: Can you condense the text into a few key points?

Me and my now ex girlfriend had been together for 2 years and we had an amazing relationship and have so many memories together

its long distance and because of how hard it was me not being there in the week she started talking to other guys, i didn't think anything of it just glad she had good friends anyway she ended up getting close not on purpose but just as friends then she slowly started to fall for this other guy but still has feeling for me so she broke up and then ended up going out with him under a week later

I believe that she still loves me (I could be wrong) but is still scared of the distance she doesn't seem to be happy with him. however keeps getting upset when we talk because of everything we shared so now she just doesn't talk much, I don't know if this is all in my head or if she actually is what should i do in this situation i thought about reminding her about all our amazing times and holidays together but don't know what to say 

do you think this new guy might just be a short thing almost like a rebound or her body's way of exploring other guys out there as we are only young kind of like a cytological experiment for herself?

please help I don't want to just move on and forget I really thought she was something special

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<bot>: Broke up after 2 year relationship ended on a good note (no arguments) she dosnt talk to me anymore as it upsets her because of the memories what should i do to keep her in my life?