<human>: Can you succinctly summarize the text in 1-3 sentences?

My husband and I have been married for three years but we met in junior high. Even though we didn't date til after college, we were friends all through high school up until we realized we wanted to become a couple. 

My husband has a great sense of humor, I've been told I have a good one too. Humor was a really big part of our friend group. We were a big group of loud and boisterous kids. Naturally, since we grew up together, our humor is very similar. 

My sister is a few years older and we weren't super close in school (that age gap seems big when you are teens) so she didn't spend lots of time with my friends. She lived out of the state for a long time but has been back and we've been spending lots of time together. My friends (including husband) have integrated her into our group. My husband was being funny and sister was busting up. Apparently I didn't even Crack a smile. Later she asked me how I can hear him be funny and not laugh. I said I guess I was just used to it, but it got me thinking. 

It's not that I find him UNfunny, I think I'm just completely desensitized. A lot of our humor comes from an element of surprise or 'wackiness' and I guess it's just not surprising anymore. I'm not irritated by his jokes, but I don't react like other people do. That isn't to say I NEVER laugh at his jokes, but I'd say I more often don't. Humor is a big part of our lives and it can't feel good to have his spouse not laughing. God, I must seem really unfun. 

So reddit, what am I supposed to do? I can't fake laugh. I can't ask him to change his humor. Help!
<bot>: I've become desensitized to my husbands jokes and I haven't been laughing. Humor is a big part of our lives so I'm worried this is hurting him. What do I do?