I feel like dying.... Help me please.?

My life is so horrible. when i was in 3rd grade my dad suffered from a heart attack. after a couple of month he kinda recovered. When he was about to go out of the hospital i was so happy. But right before the day he was suppose to leave, he had a coma. I was so sad. Now only once in a while he can remember me. Not all the time. When i visit him sometimes he can't talk. But just look at me. About 6 years p and people at school tease me because i act gay. Its not my fault I was raised by my mom so I adapted to her "actions". Plus my mom job pays her so few money and my mom got to constantly borrow money in order for us to live. We can barely pay for a 1 bed room apartment and food... I'm not even sure how will I go to college. Even that I do not think we can make it that far without me being homeless... I am stressing out and depressed. I have to move 3 times switching school in 1 year. I am dying inside to make new friends but leave old friends behind. Sure I have my friends but they're ALL moving next month. Literally all of them. So i will be left with no friends. Those are the only people that would be friendly with me. All the other tease me and hate me... I am doing good in school but with this much on me, My grades are starting to drop from straight As to B- and Ds. My mom is sometimes supportive but she threaten me. For example if i don't get an A in all my cles she would kick me out. I love her dearly but sometimes my mom goes to far and make me hurt.. I'm surprised I'm not emo yet. I told her one day I will graduate from college and support my mom.. but in this condition.. I have no hope. I want to have hope but I can't... I don't feel like talking to anyone because i tried that before and it worked but then the depression came back. If i told my mom everything i said she would be depressed. Sometimes my mom says she would die because her life is so horrible and that she can't support me makes me want to kill meself right then and there.... I even held a knife agenist me but my grandparents stopped me... I completely lost faith. I prayed to God and asked for his help.. But knowing that here on earth our work must truely be our own. I have to improve it. But once again.. I have no hope. I just want this terrible nightmare to end.