27F here as well. Single and healing... My question is, have you already identified the things that you're insecure about yourself and have tried to actively work on them?
I had an issue with Alex, too. While Alex might be a cute man, I am wondering why it was his mother who will have to ask for your number, when he's 31? And why haven't he asked yours when he went to your house and gave you flowers? And why are your conversations not levelling up?
I also had a friend 27M, a soulmate, who says he wants me but will never do anything to make us a couple. He's insecure, and he's not emotionally available.
Your feelings were valid. But maybe the problem is not you, but Alex. Maybe you're expecting something, hoping for a level up, which he isn't showing. Maybe you're thinking that if Alex stopped texting you one day, then the problem is on you... That you will be 'rejected'... But the truth is, Alex is never emotionally ready at 31.