The main item in love is conscious commitment which is a choice. Common ground, attraction, etc. is just “lube,” so to speak.
Also, varied interests can become common ground if you accept you may have different opinions and experiences of things! If you like skiing and he has never skii’d, you can take him skiiing. If he hates it, it will probably make for some funny conversations.
See, the thing is, I know all this…but I’m still scared. And I guess that’s where the irrationality of OCD comes in. Where I’m afraid of the future, I was so comfortable in the honeymoon phase, afraid of changes in the relationship. There are lots of personal things I need to work on and grow.