Hot and cold Aries Man

I am a Capricorn woman dating an Aries man. We have been together a year next week. He started coming around and hanging out with me and my other neighbors not long after they moved in. We talked one on one for about 3 weeks and then.... He would constantly tell me that he loved to Party and that he didn't see it changing anytime soon. I was fine with that, bc I had been single for the past 5 years and was happy that way. We started off as being just "f*% $ #g Neighbors". Yes, We live three houses apart. Lots and lots of sex all the time. I wouldn't ever kiss him, hold his hand, and would send him home afterwards. After a few weeks, he spent a night. Over time on our next romps in the hay he started staying over longer. Laying in the bed with me, trying to hold my hand, and kiss me. I told him that I only did that with people that I was in a relationship with. Now we are about two months into this thing. It was all good, until I had a seizure. He came to the hospital. There he held my hand and kissed me on the forehead. That night when he brought me home from the hospital he laid in the bed with me and told me he loved me. It took me a few days to be honest with myself and realized that I too loved him. I told him. I thought that his love meant he wanted a relationship.
Sometimes he is great to me, treats me like gold, awsome with my teenage boys, and they have begun to love him. He would send me random sweet texts and do sweet things. Then sometimes he is so cold. Ignores my texts, says that he is busy, doesn't text me unless he needs something. Sex life has gone way way down hill. HIs best friend seems to constantly be around and trying to get between us and make us argue. Here we are getting close to our one year and he seems to be completely ignoring me. I confronted him about it. We don't argue, we talk. It doesn't get heated and if I get upset I do it in the privacy of my own house. He says he's just tired, but not too tired to party with his friend, sister, and anyone who wants to party with him. Today he texts me to see if I want to come over and watch the game. I go over and he sits on the other couch as far away from me as possible, and maybe speaks a total of a paragraph with me. Finally I get ready to go home bc he is either acting like he is asleep or is actually sleeping. I touch his arm and tell him I'm leaving and he says ok. No offer of a kiss, can I walk you home, nothing. It's dark outside by this time and t

It's dark outside by this time and there are no street lights on our street.
When it good, it's great! When it's bad, it's really bad. It's usually good when his friend isn't around.
He drinks ALOT! He recenlty found a new job and continues to drink heavily. His boss spoke to him about coming to work smelling of alcohol. So he started to limit himself to three tall boys a night. Then his friend comes around. "c'.mon bo, let's go get an 18 pack" after my guy has finished his tall boys. My guy can't say no, and his friend seems to know this, and takes advantage of it. His friend doesn't have to worry about his job bc he works for his daddy and won't lose his job. I mean his friend recently got a new truck, nice slightly lifted truck. A week later they take it to the mud. Sink it, almost destroys it. Daddy pays to have it fixed. He got a DUI, well they both have DUI's, but his friends DADDy paid for the classes, court, etc that goes along with it. My guy had to do all of this on his own. But for some reason, my guy can't see that his friend is toxic.
I don't know what to do. I'm so confused. Should I stay or should I go?
Aries men, your advice would be greatly appreciated.
Thanks for reading