SO not very open and/or vocal about his feelings?

We've been together for five years. We don't live together yet because we're only 19 and 20 but im the kind of person where I'll tell him or text him I miss him, I'm obsessed with him, he's my life, etc. All this kind of stuff almost daily. But he's not that kind of person he usually isn't that vocal about what he's thinking or feeling even when the feelings are mutual I'm sure I dont doubt that. Its just hard not to be reminded of it like I remind him all the time. Hes a little better about it in person not so much through text. But lately it's been getting me really down. Do any of you have a SO that's likewise? If so, how do you deal with it and overlook it? Thanks!