Hi, welcome
My 1st marriage lasted 11 years, 2 kids. If I take away the narcissistic side to her I'd be left with an introverted wife. I'm extroverted.
Although you are introverted you still have 50% responsibility towards the team work required to make your marriage work forever, meaning your 50% shouldnt stop. Being proactive is really important and from my own experience (if you are similar to me ex) an introverted partner can leave tasks that they should do, towards their partner. Usually social plans, holidays and even romantic suggestions being left to the extroverted partner is simply not good and will leave your partner to feel he is doing all the work.
For you to "change" to be less of an introverted is asking too much. But there is effort and when effort is made, he might respond with appreciation. Such effort could include getting the kids minded while you both have a candlelight dinner, a trip to the beach or a movie then pancakes. Whatever you plan it will be seen as trying.
The only other thing that comes to mind is admiration. Do you tell him he's handsome? Do you muck around in fun.? Do you share hobbies or interests?
I'll leave it at this point but at least, unlike my 1st wife, you are showing courage by asking here what can you do. That's a start. Well done.
TonyWK
