I don't know if anyone has worthwhile statistics on 'how common' it is, but there's been a big social push to understand different types of sexuality and different ideas of love which might help you find something to relate to.
The truth is, everyone's got their own inner definition of what qualifies as love, AND what they want out of a relationship! It's all quite intersectional with the idea of sexual identity. It's not as simple as are you gay/bi/straight, are you also sexual/demisexual/asexual? romantic/aromantic? monogamous/polyamorous?
You don't have to magically know the answer, but basically whatever you think sounds like you, there's probably people out there who identify as like-minded.
Here's like a little telegraph article I found that has a handy guide:
https://www.telegraph.co.uk/women/s...-and-questioning-a-guide-to-the-brave-new-wo/
To me, 'love' is merely the opposite of hate. You enjoy someone, you want to be around someone, you feel invested in their life. Doesn't matter how fast it happened or if it ends someday.
I recommend not 'pitying' someone who claims to have never known romantic love, nor judging ones who have gone for it and had a relationship that ended badly.