Need real unbiased advice

My boyfriend and I haven't had sex in 6 months. Not that I don't try EVERY time I'm at his house. I have to ask him to kiss me or kiss him myself. If I don't make the effort I'll never see him. We aren't the way we used to be. We were inseparable, did everything together. His grandmother wanted him to marry me. And I wanted and still want to marry him.

I know I changed after getting raped (I didn't tell him cause I don't want him to freak out and now it's to late to tell him). I feel like we are drifting apart. Is there a way we can mend this? Or were we just not meant to be?