A friend has a crush on me

I have this friend that I know him for about for five years my best friend was dating him if they break up and after that he told me that he has a crush on me and I said OK well I’d like you too I told him but he went out with my best friend and I have to talk to my best friend first before I go out with you so yesterday we were hanging out or smiling laughing and when he left to go he house He sent by we hug each other and then he text me saying that he likes me again and I said OK so what should I do