Relationship

Right so I can’t believe I’m sharing this but I have know one to talk to about this. so I’m 16 and my boyfriends a little older, 19. Not that age matter but yeh. Anyway so we’ve been together for a few months now, things were good to start, he helped me with a lot of stuff and we had a really good relationship but then things started to change when I said I wasn’t ready for sex, every time I said no he would just get annoyed at me and then wouldn’t speak to or call me boring. He also told me to not tell anyone about our relationship which is weird but yeh. That happens a few times but now it’s different and to be honest I’m really scared of him, he’s quite strong and when I’ve told him I don’t want to have sex he gets really physically aggressive, he hurts me and forces himself on me so it’s just easier if I just go along with it. He also doesn’t use protection even though we said ages ago that we would always use condoms. All this happens yet I still love a part of him as he can be so so kind and I have problems at home and I go to him as an escape kind of. Anyway i feel so confused worthless and hurt at the moment I just don’t know what to do. People are coming suspicious because of bruises and marks on my neck and arms but I don’t know wether to tell anyone as hel get mad and I don’t want to upset him either. I know this is just some app but please if anyone could offer me some advice it would be really really appreciated, thank u if u have read all this x