Firstly, there is nothing wrong with not wanting children, it doesn't make you broken, and all the more power to you for being responsible and not bowing to peer pressure by having a child just because everyone else has.
I have heard people say, wait a bit longer,see how it goes, etc.
IMHO 7 and a half years with a man you love,in a stable environment, with all those usual triggers of friends having babies should have been enough to tip the balance if it was a matter of waiting for the urge to kick in.

Infact the balance has tipped, but in the opposite direction. Once again. I will say there is nothing wrong with that or you.

The problem arises with your partner. Because let's face it this is a deal breaker in most relationships.
Yes you should have had an open and Frank discussion before you got married, regardless of if you weren't sure, just so he knew that possibility was out there. In that sense he may well feel deceived.
However you need to address it NOW, before he starts making plans for a nursery, or looking at tiny soccer outfits.
I know you don't want to hurt him or lose him but he has to have the right to choose.
I doubt he will thoughtlessly discard a 7 year relationship, unless the reason you got married was to have children.

I am very sorry you have found your self in this situation but now is the time to face it.
All the best.

(Just a side note, I am a single mother of 4, and fiercely independent. If I wanted to up and go somewhere, I just did it. Took the kids with me. I am a great believer in life experience over academic structure.
Been to music festivals, travelled in Europe, lots of trips to historical venues.
Just wanted to say there is more than one way to raise your kids. Doesn't have to be all mums coffee mornings, toddler groups or pta meetings. I really didn't change my lifestyle that much.)