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 

now that she is with this new guy she still has feelings for me and i still believe she loves me what should i do?
user
Girlfriend started to fall for someone else and she broke up with me and ended up with this other guy and still has
assistant
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 

now that she is with this new guy she still has feelings for me and i still believe she loves me what should i do?
user
Me and my ex girlfriend had an amazing relationship and she still has feelings for me she broke up with me and i
assistant