Avoidants can spend time with you, say they love you etc, but when it's over in their mind it's over. Like a light switch, yesterday I loved you, today I dont.
Any signs of moving forward, moving in, having children, being official - may be met with hesitation.
They may not be 'emotional', talk about their feelings etc.
I dated an avoidant for about 6 months, he was a nice man, he didn't love bomb me or future fake. (I'm an anxious attached, so I do that myself!)
On reflection, he always had one foot out ready to run, one argument and he decided he didn't love me and that was it. I was heartbroken.
My advice - people like this are deeply damaged (I'm excluding narcissists and abusers here) and often aren't aware of how damaged are and certainly shouldn't be trying to conduct relationships as they have little emotional connection to offer.
Anxious attachers are of course the opposite end of this and 'smother' and 'attach' to feel safe, while avoidants disconnect. They tend to attract avoidants and via versa and the push pull relationship begins.
I've had a break from dating and therapy for the anxious attachment, I'm much more aware of my core wounds now. But I've seen many anxious attachers and avoidants in the dating pool.
Dating an unaware or untreated avoidant, might feel good at the time and you might feel like they can change, but in my experience it leads to disappointment.