13 and pressured

So I’ve been dating this boy who’s the year above me at school. (He’s almost 15). He’s been so sweet to me since we got together and I honestly like him so much but recently things have been abit of. His friends often message me things like « he only likes your tits . He usually tells me it’s just banter between them but it makes me feel uncomfortable. I’ve been quite willing to do some physical things with him, but told him I don’t want to have sex until I ready and he said he understood that. However whenever he comes round all he does is make out with me and try to go further. I know that this isn’t ok but I really like him and feel like someone actually likes me. Please could I have some advice.