Lonely and depressed at 12 weeks

I am 12 weeks pregnant with an unplanned pregnancy and only 21 my boyfriend is 28 and i have only known him about 3 months met him a week before conception. Getting pregnant was truly a mistake and i know that but I don't believe in abortion personally so it is not an option for me and my boyfriend is really against me putting our baby up for adoption. But the farther along i get the more depressed and lonely i get i only moved to the state i now live in a month before i got pregnant and i know nobody but my boyfriend. He claims to want the baby and to raise it together but as of lately he has been ditching my to go on motorcycle rides and such i hardly ever see him anymore and when i do hes drinking. he says he just wants to get the partying out of him now but he doesn't seem to care that hes hurting me in return. I have a subchorionic bleed and am going on and off of bed rest frequently there fore am unable to do much. i now spend most of my time crying and sick to my stomach. i dont feel like doing anything anymore and i dont feel like i can keep going thru this i was wondering if anyone had any advice that could help me