Break it off?

I've been dating my significant other for the past two and a half years. Recently, it's struck me that I might not have feelings for him anymore. 
Before continuing, we have very busy lives.  I'm in theatre and he works with computers and performs instrumentally. So please keep this in mind.
Every time we have sex, my heart feels nothing and every time I see him, my heart doesn't flutter like it used to. He's used to electronics. So when we snuggle, he sits on his phone most of the time. He mostly focuses on himself instead of asking me questions about how my day has been and such. We spend our time inside and we've been on a streak where we watch tv, smoke, have sex, and sleep for over a year now. I'm trying to break him out of this habit but it's not working. I've told him my feelings about things that aren't working but some days, it feels as if he's not listening and just wants me to talk it out so we can have sex. 
He says I'm a significant part of his life and that he wants a future with me. But I don't think I can be when I've met his family but he's not willing to meet the rest of mine (and they really want to meet him). Is it time to leave him?