Why hasn't he said he loves me (best guess)

I'm so confused. We've been together for 8 months. I basically live with him. Just recently he acknowledged that he knew i had strong feelings for him and he felt the same. We are together every day. Haven't fought (but had a few disagreements/talks/arguments maybe 6 all together). He admitted he isn't really an affectionate person, not a lot of making out or sweet gestures or sayings. I am ok with that.

He asked me if I wanted to go to a different state with him to visit old military buddies in January. He brings me to all his family events. If I say something sweet he'll kind of mimic. Like I'll say "I'm so thankful for you" and he'll say "I'm am too more than you know" but he hasn't said I love you. I don't want to be with a person who has been with me for This long, spending every night/day together for 7 months and not know if they love me. I don't know if I should talk to him about it because i don't want him to feel pressured. But I also hate the thought of loving him more and it not working out. Why isn't he saying it? I don't want to say it first because I don't know how he feels because he never says anything first! The only time he says something sweet is if I say it first and then he'll just copy whatever I say. It's annoying.

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