No I love you

So, I've been with my boyfriend for about 14 months and he won't tell me he loves me. The only kind of explanation I've gotten is "I don't use that word lightly". It's really starting to bother me and I don't know what to do. I don't want to push it and have him say it just because I'm upset but I don't know if it's worth staying if he doesn't love me. Everything else on our relationship is great. He's 30 years old, I feel like he should be able to talk about his feelings. Any advice?