Don't let your insecurity run your life.
If it turns out that he finds someone else that he wants more than you in the future, would you want to be with him anyway ?
Do what YOU want to do and let him do the same. You and he have a pretty solid background it sounds like so build on that and see how the chips fall.
Just because a door is open doesn't mean someone has to walk through it- no matter how wide it's open
Me- Linkin Park- the husband. I am the youngest, fast paced and admittedly full of issues.
Nina Simone- our wife- slow, gritty, and sexy like a smoky piano bar and a glass of brandy.
Led Zepplin- our wife - a rocker little tomboy that loves with everything. All she's got or nothing at all.