My boyfriends family found out we're in a relationship

So I have a boyfriend and we didn't see each other for some weeks and we've been writing messages... his family is homophobic (mine probably to) and today her sister wrote me asking what's going on... she will tell my parents because I wrote wrong things(my parents don't know I'm gay) ... we usually sended a lot of emojis and lots of 'I love yous'Also, we study in the same school but we won't see each other in two weeks and I have no idea what to answer or to do... please help me. Also we could probably see each other in one day but I'm not sure if should see him as there's a risk his family could be there.