I am a 23-year-old woman and have been going through depression due to several life situations. I have a guy best friend (engaged) whom I am very close to. He has been acting as my support system to help me in overcoming depression.
Last night he was listening to me blabbing about my problems and he gave me a very warm long hug. We were in the car and I happened to fall asleep while his arm was around my shoulder. Though I wasn't completely asleep. He started playing with my hair, then pulled my hair around my ear, kissed me on my forehead several times from what I remember and then he gave me a small peck on lips. I was awake after this act but didn't know how to deal with this situation or how to react, so I kept my eyes closed and then he kissed me on cheeks and again gave a long kiss on lips. I still didn't react but turned my face away from him and he still thought I was asleep.
We are very close (we mostly gave each other hugs and forehead kisses), but being kissed on the lips is new. I would not like it to happen IF it carries a romantic/sexual meaning to him. I am also worried about losing his support, he has been a very good friend and I don't want to make things awkward between us.
Now on next day, I don't know how to face him. How can I bring this situation up and set boundaries without making a big deal about it?