How do you get out of a gay friendship?

I'm 18 and I met this 32 year old on Grindr. We were supposed to make-out in his car but he started saying I reminded him of his little brother and that he wants to be friends. The thing is: the age gap makes me cautious and I have a sexual history with older guys and I don't wanna relive all of that. He recently said he wanted to give me a massage and I was supposed to go to his house but it rained (thank god). I can already see where this is going and I really don't wanna continue this.