brother in law trying to sleep with me.

Hello. I apologize this will be long. My step sister passed away on 8/20. She has three children with her separated husband. (We will say his name is Kyle). Well Kyle and I have always been close and he came to talk to me when my sister cheated on him and left him and I was the first person he came to when she passed away. He has a fiancé and she is 7 months pregnant. Well on Monday night after her funeral he went to spend time with his father in law (my stepdad) and I went over there to grieve with my family. Kyle started drinking and was drinking a lot. I decided I was going to go home and he gave me a long hug and kissed me on the cheek and was feeling up and down my back and would slightly go down to my butt. I disregarded it and walked home (I live less than a block away). I had forgotten my charger for my phone so I went back. He said he was going to walk home and I said I would drive him because it was dark and he was drunk. He said yes and I went and got my car and I picked him up. He asked if we could drive around and talk, I said yes what do you want to talk about? He is an attractive man and at the vistation/funeral multiple of my stepsisters friends were being sexual and wanting to sleep with him afterwards. He then grabs my hand to hold it and he brings it close to his chest. He looks me in the eyes and asks me how old I am. Im over 18 but look young. He then moves my hand down to his crotch and holds it there. He has a growing erection so I get uncomfortable and since I drive a stick shift car I told him I had to shift. I take him home and when we pull up he hugs me and kisses me on the cheek but his fiancé was standing in the door so he didn't try anything else. I mean he was drunk so I don't know what to think or do. I still want him in my life but I don't know how to bring it up to him that I don't want this or anyone to find out that he wants it. Oh and before he got out of the car he told me that I'm gorgeous and he hopes to see me soon and that he wants me but he doesn't know how the family would take it. Should I message him on Facebook and tell him I'd like to talk?