Working out with significant other?

I do also. I won't work out in front of him. I go will go downstairs to the basement and he stays up.

You could, as mentioned, work out in a separate area. Part of how my family kept ourselves consistent was going to the YMCA at the same time, even though my mom would be swimming, my dad would be on the treadmills and I'd be on the machines. At the very least, that could reduce any feelings of having to compete with the gym for your S.O.'s time.

The "just joined the military" aspect could have different effects depending on what you mean specifically. If he's just signed up, I can't say much about what that does for his approach. If, however, he's gone through training, then he's probably seen these three lessons:

1) Everybody's different. You will all have different strengths and weaknesses.
2) Sometimes your strong areas that are easy for you are areas where other people have problems. Similarly, your weak areas will be someone else's strengths.
3) The only way to move forward is to work together, coach each other through our weak areas, and encourage your teammates.

So, if he's gone through basic training, then he may actually be BETTER suited to help you because he will already have had to deal with people not at the same level that he is.

Yikes.
I'm thankful I don't feel that way at all.

My bf and I used to go to the gym together. Neither of us us in awesome shape, though he's definitely in better shape than I am. We'd swap in and out on weight machines and do the ellipticals next to each other. After several months of dating we joined the same gym and we spent many of our weeknight "dates" doing just that.

We now have different routines so we don't do it so much anymore but I actually kinda miss it.

I actually love working out with my husband; wish we could do so more often. Usually we have to take turns while one of us is with our daughter. But we've been together eleventybillion years so there's no mystery anymore (even when there should be, ha). Why not give it a try but be honest about feeling a little self-conscious? He'll probably end up being a great cheerleader for you.

nope
My partner and I have just joined a Thai Boxing gym together and we go on walks together as well. I do my own seperate workouts.

Not at all. My boyfriend and I workout together all the time. We aren't in the greatest shape so we're committed to living better lifestyles. We've started cooking together and going to the gym together. He's my spotter and motivates me to work harder. Sometimes he's afraid he's not pushing me hard enough because he knows I get frustrated easily but he's very supportive. He's not very big on cardio so he'll walk on the treadmill next to me while I run. If I decide to do a workout at home like Insanity, he'll sit on the couch out of my way but continue to encourage me when I get tired.

My boyfriend and I met at the gym, and still enjoy going together. It can be nice to share the experience/schadenfreude/misery with someone else. And it can help to have someone who supports you there to push you through.