Falling in love with an asexual

I don't want to go into to many details, but over the past two years I've been getting to know a gorgeous guy, who has stolen my heart completely. He told me he was autistic which is completely fine and I can deal with that. I built the confidence up to ask him out and he's asexual which is also fine and the more he explained it to me, the more I loved him. I'm pretty sure it was supposed to put me off. I know I need to explain to him my feelings on sex and relationships because I have a health condition which causes a low sex drive anyway.
Like he's doing now at trying to push me away so I don't get hurt later, I run away from relationships when the progression for more starts.
I just don't want him to think I'm just saying it as I'm not and I don't think I could ever be sad having him at my side, he's everything I've ever wanted in a guy. He's intelligent, he thinks about and knows about a lot of stuff and he's amazingly sweet, kind and caring. He blows my world apart he means so much and he's perfect because I don't have to hit the destruction button when things move too quick. As a person who hides behind a pen or keyboard to express herself, this discussion could be hard but he makes me feel braver because I trust him.
If anyone else has had a relationship with someone who is asexual, I'd love to hear from you. I don't want to push him but I just need him to know he still fully has my heart.