Boyfriend doesn't want sex

Hey! My boyfriend and I have been dating for 3 months now and we live together (fast I know). He hasn't really been into sex and it's been bothering me. We've talked about it and he said that he's just not an overly sexual person and sometimes doesn't want self pleasure. He said he's more than willing to do things to me, but he's only done so once since our conversation 3 weeks ago. I keep thinking it's me and he doesn't find me attractive or anything. He's told me that that's not true. We have a very communicative relationship, and we've talked about all of this, but I just want someone else's situation or advice. Previous relationships have been sex at least 3 times a week.