Why does it hurt so much

basicaly i split from my ex off 5 years left with my daughter now aged to im now with lovley bloke i have known for long time and we went to same schools but he has been around a bit and i find it hard he had few nights off sex with friend off mine now were not friends but evrey time i see her on facebook or she trys adding me and on new years to upset me she turned up and my bloke proposed to me in front off her i find it so hard as all my mates are friends with her and i have to see her now and then and it cuts me up knowing he put his ,,, in her and i get so worked up over it and im now 5 months poregnant with his child and im happy about it but i just cant stop getting worked up over her and few he used to date i have to keep bumping into and it hurts so much i dont no what to do

You're feelings of insecurity need to be dealt with if you want to have a successful relationship with this man or any other. You've both obviously had prior relationships but the key is PRIOR. Since he proposed to you and in front of her, it sounds like he's not with her now nor does he want to be. If you don't want to be friends with her, than don't be. But, at the same time, don't harbor feelings of jealousy or insecurity because the only person you are hurting is yourself. Find something that interests you and focus on that. Don't spend time dwelling on things that only upset you--the only purpose that serves is to destroy. Put your mind on things that build confidence in yourself--which usually involves some soul searching. You have one life to live. Don't give that power to other people by obsessing over things of which you have no control. The past is the past. Look to your future and all the wonderful things it holds. Find your purpose and you won't have time to worry about some girl that your man had sex with in the past. Enjoy being who you are and HE won't even think about someone he had sex with in the past either. When you bump into people you'd rather not see, don't give them power over you, say "hey" and move along. Do what you do and don't worry about what she does. It's all about you and your life--not about her.

yeah i no your totaly right no he proposed inf ront her prove point to me that she was just shag when he was low a long time ago and thats all she was just hurts knowing he used to be like that. i have always been insacure because so many men have treated me like crap so i find it very hard to trust anyone now. but my friends still friends with her so i see posts from her and just looking at her shes fat ugly which i no i shouldnt be worried about but its just knowing she had my boyfriend few times in her bed makes me feel sick gets my blood boiling sometimes im ok and i forget about it but then i think about it and dont stop im just scared that i think this will be brakeing point for someone im so in love with