Everyone seems to find my relationship amusing?

Okay my boyfriend I reeeeallly care for him with all my heart <3 and I love every moment I spend with him like at school at lunchtime when im hanging around him sometimes people come up to us and say "Do you two go out?" and were like "yeaah"...sometimes girls or my close friends say "oohh you' are such a cuute couple" but sumtimes ppl ask that question and i can see it in their face that they find mine and my boyfriends relationship amusing or sumfn? like theye either laugh like "are u stupid?" or.. look away with a "wtf?" face...its sooo annoying like theres nufn wrong with it were both the same age, hes reeally gorgeous (to me) & yeah? but still pp seem to hav so,me kind of problem wit it like they find it funny ? im 14 btw