I spent a lot of time worrying away at this question with a previous partner. We didn't have kids together, so that wasn't a consideration, but I went through the whole 'how do I know if I really love him/if he's the one' thing, over and over and over. I looked at our friends and thought 'well, we're not as in love as they are/we don't do that/they look like they're having more fun than we are'
Do you know what? It killed the relationship stone dead. I spent so much time worrying about whether or not I was happy that I forgot to just be happy.
In the end, I began to tell myself that if I needed to spend so much time thinking about whether I was happy, that must mean that I wasn't. After all, it was no longer always heart-racing, knee-trembling stuff, he irritated me a bit sometimes, now and again I saw other men I fancied more, etc, etc, etc...
So I left him - and I promise I am not exaggerating when I say that I have regretted it every single day since. And this was years ago.
I'm not saying don't examine things, don't think about things, just carry on as you are. But please, please don't do what I did, and give up on a lovely man and a good relationship because it's not a passion-fest 24/7 (or even at all!)
Hope this doesn't sound patronising as it's really not meant to be - just wanted to say, been there, done that, still wearing the t-shirt...