Insecure af

So I’ve been dealing with insecurity for a while, I’m very petite and have a very small butt and skinny legs. My ex boyfriend and social media in general has really affected my confidence, and I can’t seem to love my body anymore and it’s so sad. I feel like I’ll never be happy unless I gain weight in my lower body . But no matter how much I eat I don’t seem to gain any weight, and if I do, it’s all in my tummy. I’m so unhappy with my body, how do I get past this and how do I stop comparing myself to others (especially the girls that my ex used to always talk about while we were dating) :(((