Are my feelings justified?

Hi ladies. My husband has been away for a few months now for his year long deployment and everything has been going good. We communicate very well with each other, I make him care packages each month, and time is going by better than I thought. However, yesterday when I was running some errands, my mood shifted a bit. I saw a couple holding hands while they were walking and then there was another couple in front of me at checkout that were being lovey with one another and I felt some type of way when I saw both the couples. I became a mixture of upset/sad/jealous because I’m not able to do those things with my own man. I was wondering if anyone else ever feels that way or do you all think my feelings were normal or ill-willed?