Well im only 13 but maybe this will help.
I used to be exactly like you, i made jokes and everyone laugh but i could never get a girl. Then a good friend of mine about a year ago told me how the girls think im just a clown and i should stop trying hard to make people laugh (It didnt feel like i was trying hard though.) So i stopped and for about 7 months i stopped being the "Funny-guy" and sometime before that there was a new joke-ster. So now im still far from popular but i can really talk to girls and hang out with them. The point is, even if you try or even look like your trying to be funny girls wont take you seriously (at least in my school they don't.)
My suggestion would be to be funny (but not a wise guy) on a date or something.
Hope my post helped
EDIT: Worry about school not about losing your virginity. If you have self respect, others will have respect for you.
I used to be exactly like you, i made jokes and everyone laugh but i could never get a girl. Then a good friend of mine about a year ago told me how the girls think im just a clown and i should stop trying hard to make people laugh (It didnt feel like i was trying hard though.) So i stopped and for about 7 months i stopped being the "Funny-guy" and sometime before that there was a new joke-ster. So now im still far from popular but i can really talk to girls and hang out with them. The point is, even if you try or even look like your trying to be funny girls wont take you seriously (at least in my school they don't.)
My suggestion would be to be funny (but not a wise guy) on a date or something.
Hope my post helped
EDIT: Worry about school not about losing your virginity. If you have self respect, others will have respect for you.