Dry texting 😕

So my boyfriend is home for the holidays since he graduated Army basic training. I know the military can change a person but you’d think since he hasn’t seen me in 3 months he’d be really talkative with me. When we text or Snapchat he send really short replies or sends snaps without saying anything. The first day I got to see him we went out to dinner with friends and when he first seen me he didn’t even act excited. Then at the restaurant he talked to his friend more than me and he rarely looked at me. I felt so pushed aside. But last night we hung out and had a GREAT time together, but now it’s gone right back to short replies. He tells everyone that he wants to be with me but I just feel like there is something off.