If you want to tell him you love him, the best response is: " Te amo". In spanish Te amo is a strong phrase, when feel very attached to this person you will say this. You can choose to use "Te quiero" which is a less intense form of te amo, yet stating that you love him. Te quiero could be used for your mom, relatives, even your pets. When you want to translate "I like you" in spanish it is usually "Me gustas", a informal usage to express that your actually attracted to that person,
Hoped this helped, Yazmin
Hoped this helped, Yazmin