One of my friends and I became very close a few months ago. We have known each other for years and years and I used to have a massive crush on him.
After he broke up with his girlfriend he asked me to help him find someone new, and as a friend who no longer had feelings for him I said yes. After a few weeks and him talking about girls he knew were not single he started asking me about my sex life.
We both told each other alot about ourselves and this led to him making suggestions about us having sex which I said no to and he would respond by adding he was only joking.
We went away with a group of friends recently where I met a guy (lets call him Mr. X) who I liked, Mr. X and I flirted and after my friend had a word with him, Mr. X stopped flirting.
Later we were playing cards in a group and my friend had no chair so he sat on my lap. And most recently he suggested we be "f**k buddies", but later said he was only joking again.
Is it normal to think that he wants more than just friendship?
After he broke up with his girlfriend he asked me to help him find someone new, and as a friend who no longer had feelings for him I said yes. After a few weeks and him talking about girls he knew were not single he started asking me about my sex life.
We both told each other alot about ourselves and this led to him making suggestions about us having sex which I said no to and he would respond by adding he was only joking.
We went away with a group of friends recently where I met a guy (lets call him Mr. X) who I liked, Mr. X and I flirted and after my friend had a word with him, Mr. X stopped flirting.
Later we were playing cards in a group and my friend had no chair so he sat on my lap. And most recently he suggested we be "f**k buddies", but later said he was only joking again.
Is it normal to think that he wants more than just friendship?

He sounds like a jerk. I think it would be a mistake.
He torpedos Mr X as if he has the right to. Makes lame sexual advances, including the insulting "fuck buddy" request, then covers it up with "just joking." And what I don't hear from your post is - where are you at with this?
And I bet he hasn't heard it either. So where are you at? Think about it. He doesn't want to be your boy friend. He doesn't want you to have a boy friend. He wants you to put out sexually for him...
My suggestion: respect & stand up for yourself, tell him how inappropriate he is behaving to back way off & stick to it by putting some distance (physically & emotionally) between you.