It depends of what are you talking about: If you mean "like" in a sense of "being attracted to someone" you would say "él cree que nos gusta" If you mean "like" in a sense of someone being "enjoyable" you would say "él cree que nos agrada"

- El cree que nos gusta - El piensa que nos gusta

literally,"El cree/piensa que gustamos de el" but can be interpreted like "el cree/piensa que nos gusta" in spanish the verb "like" is "gustar"... here you are some conjugations: I like - me gusta you like - te gusta she likes - a ella le gusta we like - nos gusta they like - les gusta hope you help, greetings!