Hello People i have a tricky question?

I have a girlfriend who wich i have a child with..... she lives with her parents and i (live) stay with them but the house works like this i have no privacy everybody is in our (my) business and i hate it the house is very small and her mom annoys the living crap out of me she thinks she ows my baby.. well thats beside the point, i LOVE my girlfriend with all my hear and i can say it with confiedence because i do i would never cheat on her betray her or otherwise, the situation were in has put a strain in our relationship, i recently got hired at a bank and im excited but as a teller and only getting paid 12.50 an hour wich im greatful for is no where enought to afford a one bedrood apartment is the area in wich i reside plus all the baby stuff diapers ,formula.. etc, im not happy with the way my life is goin so far i am considering ending our relatioship and persuing happiness for my selfe and im focusing on my career to give my family a beter future.. Please help i dont know what to do anxiety is killing me it will be hard for me to walk away but at the sametime anguish is killing me at the place i find myselfe.. just a year ago i was a 18 year old kid who was having fun with his friends and partyg and what not then i met the woman of my life wich i had knows since middle school.... but now what to do?? what to do????