Please be kind with the words you say about yourself, even if you're the only one to hear them. Things that we flippantly say about our bodies, like "omg I hate how my stomach looks right now", "yikes I need to work on my arms", and "I'll look so much better after I lose just a few pounds" become our internal voice. Sadly that's the easiest way to erode our confidence and body positivity.
To build that back up, say uplifting words about your body everyday, even if you don't believe them at first. Now when I see this picture I think, "I love how soft and squishy my tummy is!" 💗 "My thighs are so large and strong" 💗 "My body is perfect and deserving of love as it is" 💗