I have crush on an older guy and i think he likes me too?

im 15 and hes 18 and i think i really like him and he maybe likes me too. i really dont know what to do beacause we are in really different ages and parts of our lifes while im in school hes is in college and have more responsabilities and freedom. here in chile it is normal and legal to date someone younger when you are 18 or more, i hang out with guys from 1 to 3 years older than me but maybe he thinks im just too little for him please i need help