<human>: Give me the gist of the text in a nutshell

I've been married for a year, to a man I've been with for seven years. We have a happy marriage, and I love him more than anything. 

Now. His business partner. This guy is also one of my husband's very good friends. They've been friends for almost five years, and my husband esteems him very highly. I respect his friendship, and I'm happy that he has such a good friend. But I'm not happy about the way his friend acts around me. 

This guy somehow managed to figure out all of my buttons and likes to push them unceasingly. He'll post things over social media that he knows will irritate me, just to piss me off. He comments on things that I post, and will often stop working just to respond to something I say (with something else that he knows will piss me off). 

The weird thing is that whenever I see him in person, he's very polite and quiet, which is strange for him because I know that usually he's very talkative and loud. 

I'm starting to think that he hates me, and his constantly pushing my buttons is starting to really piss me off. I've spoken to my husband about it and asked him to have words with this guy, but he tells me to relax, that he's just joking around. 

My question is that I need to know how to proceed. Normally I would simply walk away from people like that, but in this case I can't because he's important to my husband and they own a business together and he's going to be in my life for the foreseeable future, whether I like it or not. Bottom line is that I don't want to come between them either. I have a best friend too, and I know how wonderful that is and I'm happy that my husband has that too. I don't want to ruin that for him, despite what my personal feelings might be. 

How do I deal with this guy? Reddit, any suggestions?
<bot>: Husband's friend and business partner is giving me a hard time, saying things to piss me off on purpose, and I need to know how to deal with this without ruining their friendship.