I (male), want to get back together with my female ex-girlfriend but I have slept with 4 men while being broken up in under a year

I really want to be with her but at the same time I don't want to use her as a mask or beard for my true sexuality. I think I owe it to her if I truly love her to tell her I'm possibly bisexual if not at least been sexually active with other men. Ive heard weird stories of guys purposely hooking up with dudes who have gfs or wives. To each it's own but sorry I'm not doing that to somebody. I just don't think it would be right. However, her family and my own have expressed homophobic remarks only for the fact that they themselves believe that the entire party listening to their shit is straight or heterosexual as if it makes what they said any less disrespectful. Obviously it doesn't. It should also be known that I would never be in a serious long term relationship with men. Ive semi-tried and just not for me on that end of the spectrum. I just have a very specific type and if it's there in front of me I'd probably fuck once and that's it. I'm also waiting a couple of weeks for std results before I make any decision to sleep with anyone else. But yea any advice would be great

TLDR: If I were to get back with my ex would it be best to tell her my possible present sexuality change and differences?

Also sorry if my wording or language comes off offensive to the community. I mean no harm and would be open to learning.