Should I suck his cock.

It sounds to me that he was not ready for what was going to happen. Don't blame yourself, you have an urge and a want that you are looking to satisfy and you are going to give up because of his problems. Don't do it. It may take a while to find the right permister to give it a try with but it will happen if you really want it to. I had doubts originally although mine were whether or not I would swallow, the first time I took it in my mouth and worked up to that point where it swelled that extra little bit and started to pulse on my tongue I knew that i would not be spitting out what I had enjoyed so much making happen. If everybody gave up on their first failed attempt there would be a lot of lonely people out here.
ShortSupply

Here is the story of the first time I sucked cock,

https://www.cuckoldplace.com/28_29103_0.html

I have done if several times since but not "addicted" I guess, Its somthing I do a few times a year and get my "fix", and I will do it again.

Im not saying that you should or shouldn't keep trying, I think its up to you and whaterver you want and feel comfortable with.
cocksucking wannabe cuckold