M.,
It's hard to make yourself be something you aren't. But, in this case, I think it would be worth your effort to try as much as you can. And it sounds like you want to, and that's great.
My husband and I are very affectionate. But, you wouldn't know that if I didn't tell you. It's the subtle, little things that keep us emotionally and physically in touch...
A day never goes by that I don't tell him I love him or vice versa.
I always try to thank him when he does something around the house (even though it's his house, too). Or I tell him how sexy he looks folding laundry. Lol.
I email him at least once a day for whatever reason or send him a text. Usually it's actually about something (what do you want for dinner? who's getting the boys? etc), but I always add a comment or start it off, "Hey sexy" or whatever.
When I pass him in the hall, there is always some sort of grabbing going on. Either by him or me. We gotta watch this as our 2.5 y/o gets older, lol.
Lately, we've been sick, so sex hasn't been our normal. But, I still insist on being held or whatever. I also get a back scratch from him every single night. He does it and although he may tease me about it, I think he likes that I want him to touch me. Does that make sense?
I still wake up to pump (breastfeeding) in the middle of the night and when I get back into bed, I always kiss him or rub his back or hold him - even if just for a minute.
Again, it's not like we are attached at the hip or anything in fact, a lot of nights one of us (him) will fall asleep on the couch and the other goes to bed. But, I think it's the silly little things that just keep us going. We've been married for almost 7 years and together for 10.
Good luck.
T.