My husband is the same way. He's very introverted and knows that I am a lot more outgoing and that people are quite responsive to me, and I think that feels like a threat to him sometimes. He feels it will be easier for me to find people, while he struggles to even talk to other people. I also understand the "foot to the gas" part too. Sometimes I want to rush into things because I feel I can handle it, but I know that I need to take my husband's thoughts and feelings into account and work at his pace too. He's doing the same for me, when he asks things of me that I need time to work up the courage to do.
I really really sincerely hope you guys can work stuff out. I know divorce is never an easy process. Best of luck.
"When we are first born, all we know is how to want, we want food, we want attention. Natural instinct, I guess. But kindness is something that we all have to learn as we go. It's something that grows and develops slowly over time. True kindness isn't something we are born with, it's something we have to work at, we have to mold it and shape it within ourselves. Not everyone has it, but I think everyone has the potential." - Honda Tohru