A girl I’ve been seeing body-shamed me (kind of)

So I’m like 5’8 and 50kgs. Yes I know I need to gain weight, but I’ve been on the skinnier side my whole life. And I don’t have any problems too, I run and play football quite frequently.

This girl almost fell so she grabbed me, and then commented in a disgusted way about how I don’t have any flesh and all she could feel were bones.

This really fucked me up. The way she said it really really hurt me. I’m already insecure about my weight. And also she said she really likes me a week ago

I don’t really know why I’m writing this post, I think I just wanted to vent, and ask what should I do? What would you do in this situation?