Skinnier meaning weighs less? It's a little weird but if he's only a little taller it's not that big of a deal: girls have more body fat than guys and unless he has some muscle it's not surprising that if you're almost the same height you might weigh more.
Most Helpful Girl
It's normal, women naturally carrying more weight since we're meant to carry babies and all, men don't typically have this issue.
I feel like my boyfriend is skinnier than me too (I'm 19 and he's 21) but because I'm also a small person and he's a good head taller than me, no one really thinks it's weird. We're just both slim people. Don't worry so much about what others think, anyway. It's how you feel that really matters.