I need help with my girlfriend!!

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So im 25 years old and i have been in a relationship with my girlfriend for 7 years. She has a daughter with 8 years and i've been the closest thing to a father to her. Her real father disapeared without any worries.
My problem with my girlfriend is that she is really jealous and im the type of guy that loves to please everybody. She doesnt want me to have any female friends wich at first I didnt care and I alienated all my female friends to the point where i have none. Only girls i talk to is either mutual friends or co-workers and even then she sometimes complains about it. She doesnt want me talking to co-workers and 90% of them are woman. I feel stuck and I always tell her that i dont talk to them.I have been feeling like shit because she is always saying she doesnt like me working there. I want to breakup with her and this time for good but i cant help but keep thinking what about our little girl?! Im positive she wont let me see her ever again. And how will the breakup afect her growing and personallity. She's the only reason this relationship has lasted so long. WHAT THE FUCK DO I DO HOW DO I BRING UP I WANT TO BREAKUP WITH HER l?!? And what about my little girl? I dont want her to grow up hating men...