Walaal I would advise you to give up the drinking and the girl, she will not improve your life at all. Allah ku abaso. There is no benefit to sinning. I moved out and did everything you are doing apart from the wine and wallahi every day of my life I regret it.
Stay home, get closer to the deen and look for a good somali sister to marry. You seem like a good guy, and unfortunately alot of our sister are looking for good men. Don't fail them. This girl is temporary. I have been in relationship, with cadaan girls. They want to force you to assimilate, to lose yourself and become like them. Remember who you are and don't forget allah is always watching. Even if your parents can't see your sins, Allah can.