Try to relax a little about your feelings towards Alex. Take it slow. You know for a fact that he is not ready for a relationship. So you are taking a big chance investing your time and your feelings for a relationship that may mostly be in your mind and may never really happen. When a guy says he is not ready for a relationship, usually means...HE IS NOT READY.

In your case, there are three possibilities:

1) Alex may see how much you love him and realize you are the one for him and may want to be in a relationship with you.

2) Alex may just want to hang out with you for sex while he goes out with other guys until he meets that special one.

3) Alex will not want to hang out with you because you are too pushy.

Now that you know some of the possibilities, only you can decide whether or not you want to invest time and effort to try to change Alex's mind. Just know that someone special, who is ready for a relationship, may be out there looking for someone like you. Hopefully, he will not pass you by while you are too busy with Alex. Good Luck!