Project

I had a friend over at my place the other day, now he's always been straight but I've been working on him as a side-project if you catch my drift....
So we're sitting there and it's getting later and later , we started talking about sex and I finally asked him to show me his cock and he did, he had a beautiful cock and I asked him if I could touch it and long story short I sucked that cock untill he exploded in my mouth.
Right after he came he janked his dick out my mouth and stormed out of my appartment leaving me a hot mess by myself.
After that day I've been seeing quite a lot of him and everytime we see eachother he wants me to give him a blowjob which I'm glad to give to him I have to say.
I have been craving that magnificent cock up my ass but he's been quite reluctant to give it to me.
So..... to whom ever might read this post and has been in a similar situation please give me a couple of pointers on how to get him to seal the deal. I'm no rookie but this guy's really hard to swing!!!