There are two ways I approach this question: 1) how comfortable I am with the appearance of my body (physical), and 2) how comfortable I am inhabiting my body (phenomenological). I'd say I'm comfortable with the way my body looks because I can recognize the aesthetic appeal of my body. However, I have a much harder time feeling comfortable in my body. Maybe this will sound odd, but I often feel like I'm merely occupying my body, instead of functioning as a cohesive mind-body whole. I also struggle with low self-esteem, so the way I view my body can change drastically depending on my mood.

I guess my point is that confidence is independent of physical attractiveness, and it's confidence, not attractiveness, that makes you feel comfortable with and in your body -- enough to post (and not delete) pictures of yourself. If your only worry is something physical, I can promise you that there will be at least one person who finds your body attractive -- more so if they like your personality.

As for how I'm dealing with it... by practicing mindfulness, working on my self-esteem, and not posting or sharing nudes.