I Am a Military Girlfriend

My boyfriend's in the Navy and I understand he's busy and can only text me during certain times of the day depending on the day and what he's doing. We actually speak a good bit for him being in the military, but sometimes he won't reply to a message from me but he'll post a Facebook status or a snapchat video. It bothers me a lot, but I don't want to seem needy or controlling.. any advice would be greatly appreciated