I really like this guy, but he hasn't had a gf since his mom died 2 years ago. Why is that?

People get over loss at different rates. It may be difficult for this guy for many reasons. It's difficult to lose a loved one.

If you want to go Freudian, it's very possible that his subconscious doesn't want him to be in a relationship right now because of the love he had for his mother (Oedipal or not.)

When we are attracted to people they'll tend to have similar attributes and personalities that remind us of our parents (assuming you have a bond with your parent or, if you subscribe to the nature point of view, they have similar dominant traits that you want to be passed on to future generations on a biological level.) So it's possible that all the girls that this guy is attracted to remind him of his mom.

If you intend to date him please be patient with him. It's important that he knows that you're there for him for whatever he needs-- if you force him into something he's not ready for it will end badly.

Good Luck.

He isnt ready after loosing one woman in his life he needs to calm down a bit he is probably finding it hard loving another woman at the moment and you need to settle down until he is ready. or maybe he just isnt interested in anybody at the moment.

i think he is still grieving about his moms death and he is still not yet ready to be involved with anyone emotionally that is why. All you could do is be there for him as a friend since it would not be hard for you help him to overcome his mom death and i know that would mean so much to him