I Like You, You Like Me, Now What?

I've been dating so long it feels like I forgot what to do when you move from dating into a relationship. I find it incredibly overwhelming. And I find it the most stressful when I really like someone. Because honestly, it is very rare to find someone you like, and who actually likes you back. But then what happens? I've never really been around that many "good couples", you know the ones. They are happy, in love, and sure have their issues but they are good together and content. And also something that I want.

So basically, all I'm asking is for advice because homegirl is clueless