Can anyone help me??? http://www.sofeminine.co.uk/world/communaute/forum/imforum/smiley/g28.g

i am in need of help, i am a mother of 2 and very unhappy right now. my current partner whom i have been with for 7 years on and off father to my children is causing me to want to end the relationship!. i dont go out anymore, not even to see my friends or family, when i do get offered to go out i end up cancelling on the day i dont no why, is it because i dont want the alkwardness when i get home or just the fact that i`m worried about going out?..... he doesnt go out at all, he hardly has any friends and does not like mine!
if 1 of my friends come visit me he makes them feel alkward or unwanted round the house!
I have tried talking to my friends about it and they just say get rid of him, which i no i should be really doing but dont no if i feel sorry for him cause he has nowhere to go.....
also other people are saying that i`m suffering from pnd but i honestly dont think i am, the problem is just him!
we have split up once before for nearly a year and i was in a relationship with the most wonderful person who made me so happy, but my ex made it impossible for me, when he used to collect our daughter he was so nice to her, took her out they had so much fun togehter and i hated not being part in that so i had him back. the fun ended and he was back to his old self....
my daughter is being really naughty just recently but is fine when he is at work!
I really dont no what to do for the best, i no my children would be much happier with 2 separated happy parents rather then a couple that are always arguing!
He knows how i feel and that i dont really feel like we should be toghter anymore, but hasnt done anything about it, think as long as he is with me it dont matter if we are happy or not!
i do have offers from other people so its not that i`m scared of being alone!
Does anyone have any idvice for me........... please