I see many people here mention that this is an online relationship. but I don't see where the OP stated that it is. That said, if it is an online relationship you are falling for a personality, not a whole person.
I fell for a guy online. We communicated for over 2 1/2 years. Long story short, we never met and one day he told me that I was relying on him for all of my emotional support, which was true. He never contacted me again and would not respond to any of my messages. That is when my lovely journey with Mental Health began. That was 14 years ago. Don't fall in love with a personality. Fall in love with the whole person.