Should i break up with him?

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Okay, so im 15 and been with my boyfriend for 3 years now (i know right? we met when i was 12 and he was 13) i've always been extremely mature for my age due to my childhood, and it is also a long distance relationship (please, no comments about that) when we first met, i was talking to other guys and was talking to my "ex" (honestly?! i was like 11 when i was with him, so hardly a relationship) and he went CRAZY and went on about how much of a cheater i am etc, anyway he was insecure ever since. Ive always been friends with guys more than girls as its a LOT less hassle,i was speaking to one of my closest friends and a few others over facebook, and one day he demanded my password, so i gave it and he went MAD, and that was the start of last year. ever since, he has been so controlling, i cant go out with my friends because he thinks there will be guys there, im not even allowed to the gym. he barely ever wants to talk on the phone and this year he didnt even get me a birthday card because he "couldnt affort it" (i wouldnt have even minded it written on a piece of paper. its the thought that counts to me.) anyway, a year later and he's still the same. shouts almost every day and curses, calls me names and everything whenever i so much as get a friend request from a guy. But i love him more than anything, when hes not mad at me he's the sweetest guy ever. A few days ago my dad got into an accident and fell into a coma, he still hasnt woken up and ive been extre (will continue..
part 2. extremely shook up about it and visiting every day, hes been supportive up until last night when i had a friend request from a guy who is bestfriends with my ex, he messages him through my facebook and found that out himself. He sent me a very nasty whatsapp message about how sick he was of me and my facebook, and how much of a whore i am and blocked me on it. This has happened many times before so i know things will turn out fine but do you think i should break up with him?
also, i dont even so much as have ANY guy friends now.NONE. i dont speak to ANY guys over anything, not even sms. but he is convinced differently. I honestly dont speak to anyone, but he is convinced otherwise. i think it is so heartless of him to do this to me on a time like this when i need him most.