to like = mögen
For example: Ich mag dich (sehr). (I like you (very much).)
It's an universal word and can be used in almost every context. But if you, as a female, say this to a male friend, it's not unambiguous whether you mean "love" or "friend zone". If a male (non-gay) friend says "Ich mag dich" to you, it is very likely that he is interested in a relationship.
If a (young) female wants to express something that's more than friendship but yet not love, she rather says something like:
"Ich glaube, ich mag dich ein bisschen" (I think I like you a little bit) or "Ich glaube, ich bin ein bisschen in dich verliebt" (I think I have a little crush on you).