Boyfriend in army is more distant.

I’ve been with my boyfriend for over two years. We’re already one year in being long distance, and I’m getting more paranoid. Is it normal to be so paranoid that your significant other is cheating? I sent him a Valentine’s day care package and he never opened it because he went out of town to visit family. (I know for a fact he was visiting family) but it made me feel like crap because he never took the time to open it before leaving for the weekend. He’s been more busy and doesn’t like FaceTiming at all. To me, these are simple things to have in a long distant relationship. His messages are shorter and less frequent. We’ve talked about getting married once I’m through my last bit of college. It’ll take some saving up to get married and move with him, but he doesn’t even want to save up. Should I be bothered by this? Are there any red flags I should look out for? Just need some advice.