Me and my dp split for 6 months last year, we got back together after a lot of him putting it off beforehand 
, and a few months ago I found out 2 days after we split he was on tinder messaging girls an unblocked an ex. Bearing in mind those 6 months he strung me a long saying he was going to come back eventually, looking back at myself I am embarrassed.
It keeps playing on my mind, one minute we're fine, the next I look at think do I really know you? I don't want to keep bringing it up.
Will I ever forget about it, or is it just not worth it and move on? It's obviously forget about it and never mention it again or move on, I don't know!
I never thought he'd be like he was back then an I question all the time if i realllly know him!