Wat would u do??

So I've never been in an environment like this (just downloaded this app to keep track of my cycle) and I just need other ladies opinion besides my girlfriends...I've been in a relationship for the past 9 years. No, we aren't married due to personal . preferences...recently I decided to step back from our relationship bc of his promiscuity. Not saying he has sex with other females, he just flirts a little too much. We've decided to live separately and i guess you can say I'm taking it a little hard. This man has literally been my middle.school sweetheart and we've been through so much. Should I just walk away and leave..or stick through it???