Ever since I was 12 I've been struggling with body complex and eating disorders. This is honestly the first summer in my life that I'm saying fuck it and choose not to focus on the bad thoughts. One year ago I would've never gone to the beach after having a meal, because I was too afraid I was going to look fat etc. This summer I'm finally learning how to reach body positivity and how to not only stop disliking my body but how to actually LIKE it. Here's my best advice at the moment for you who feel uncomfortable in a bikini.
1. Unfollow people on sociala media that make you feel bad. We all have different body types and we all look different, that's just how it is. But for a long time I would torture myself by following hundreds of fitness and model accounts on Instagram. I could scroll their profiles and perfect (and edited!) bodies for hours while feeling bad about myself. When I finally decided to unfollow all the channels that made me feel bad about myself, it helped immediately.
2. Face your food fears. When you eat a pizza and five cinnamon buns (like I did today) and realize you didn't gain 5kg or look any different, you'll feel much better. When you force yourself to try all "scary" foods, you'll realize they're not so scary after all. :)
3. Wear 'feel good' clothes. Wear clothes that make you feel GOOD and boost your confidence. I've made this mistake way too many times where I'm forcing myself in a tight dress or way too skinny jeans and then end up feeling bloated and bad all evening. And that sucks.
4. Accept your body. For me the hardest challenge was realizing that I couldn't be healthy and a size XS at the same time. . I didn't want to accept that my ideal weight was something other than super skinny. I thought it was unfair that some people simply had a more skinny body type than me. When I stopped fighting my body on this one and accepted that I wasn't supposed to be a size XS I actually also started liking my body a lot more.