I don't know what to do😓

My boyfriend isn't the most emotional person on the planet...I've never seen him cry except at the ending of fast and furious 7. The thing is is that a lot of the time I have no idea what he's feeling. He makes a lot of jokes about relationships. Btw this is his first relationship. And sometimes I get worried and anxious because a lot of the time I don't know if he actually likes me or not. We've said I love you to each other and I got a response back but he told me that he doesn't like the word because it's to sappy. And it's not a fun feeling thinking that he might be just in the relationship for the goods. There are some really good days and really bad day in our relationship. I just don't know how I can help him open up and see if he actually loves me because if I can't I don't know if I can take any more jokes...please if there is any suggestions bad or good I would love to hear them, thank you