Hm. You realize that this may be a bit premature?

You're in the midst of your growth curve, I'd go a bit further before thinking about selling the company, especially if you want to remain 'happy'. Selling a company usually means there will be some strings attached, for instance, you might end up working for the acquiring party for a set period (possibly years...), and you will lose autonomy, which is one surefire way of becoming less happy.

On top of all that you'll have to negotiate a deal (preferably one which does not leave you with a bunch of illiquid stock but with a nice pile of cash), and that too will take a lot of organization and knowledge.

I'd suggest you do everything you can to read up on your situation and what your options are before you commit to any moves.