Good morning Gabrielle
I read your posts and think just how familiar your feelings and experiences are. I did just what you are doing. Last year, after many years of arguing and not being a couple I told my husband I had enough. I moved out and felt, initially, elated. It then hit me about four months later what I had done.
The massive change from being the person that ran a lovely home, looked after my lovely daughter and had my dad around to care for was all gone. I wasn't seeing my daughter every day and that tore me apart.
All the grief got mixed up and I began to believe I still loved my husband and wanted to be back with him. He, by then, had moved on and wanted nothing to do with it. In retrospect thank goodness because going back would have solved nothing.
I went through terrible crisis ending up thinking my life had no point. That's when I went to the doctor. That was four months after I left.
In the end I moved back into the marital home to be with my daughter; who I believed was being neglected by her dad as he pursued his new relationship. That was the best thing I could have done. My ex moved out to be with his new love. From then it has been onwards and upwards with a bit of a backward slide with this latest, ill advised, relationship.
However, this I believe, has served me good to make me realise I have to be happy with myself before getting involved with anyone else.
On the matter of the man. Absolutely Yes you have to tell him that you know about the flirting. If he is armed with all information he can then make an informed decision on how to treat you. If he has no idea how much it has upset you, he can't respond can he? But, please, please be very wary. This sounds like an incident where he's behaved badly and wants to put the blame at your feet. A few more months down the line he does it again and can't understand why you don't just put up and shut up - you did last time.
But if you are so unsure that he will take good care of your heart, you need to think about staying away. I was clear to the guy I had a short relationship with how I felt. I think I said in words of one syllable to make it really simple for him. I was very attracted to him but didn't want a person in my life that could blow hot and cold. He chose not to respond in a way that made me feel sure of him, so I took the only route that was right for me. Looking back now I'm feeling very proud of myself that I did that. Yes, there were wobbles where I thought maybe, but in the end it made no difference. Please give yourself tiime and be very, very careful with your heart. It is yours and yours alone and only you can truly take good care of it.
Good luck my lovely. You sound like a lovely person that is going through huge changes and upheaval in your life. Take care of yourself first before even considering taking care of anyone else.
XXX