months ago i started a new relationship. we had been chatting online for 5 months first & after my previuos relationship & all its problems its a big deal for me.shortly after we first met he was introduced to a friend, slightly younger than me, & currently seperated from her husband.I wasnt expecting this, but there seemed to build up an attraction, as we kept bumping into her & she's much more bubbly & slimmer/fitter. There was a day when they were obviuosly flirting & freind didnt seem at all bothered about doing it, & was quite clearly making a play for him ; & he was going along with it...I finally asked new partner & he admitted he found her attractive, " but i'm with you, & im not interested in anyone else" were his words. I told him i didnt want anything to change but that i was uncomfy with it being as my ex was always flirting online & often in front of me..& my confidence is low from that.He has been working away & is back soon, im still meeting up with 'freind' & already im apprehensive about inevitably bumping into her & having all sorts of weird thoughts re they are better matched et etc ( they have some things in common too) & i know wheneve rshe is around i wont feel happy. She is also likely to be joining a group we're both starting locally so they will have contact through that. im socially quite isolated so i dont want to stop freindships when i dont have many & she lives opposite me!