Hi Ariana,
This guy doesn’t care about you and he doesn’t want to be with you.
He told you that you deserved better when you told him that you still wanted to be with him. Which means that he already knew that he would not be a trustworthy partner to have.
He kissed another girl behind your back while on a double date.
The both of you were in this relationship for 9 months and he never made it official. He should have known within 9 months if you are the girl he wants to be in an exclusive relationship with. That is more than enough time for his so called confusion to clear.
Even though you asked him multiple times if he wanted to be with you and he said yes, his later actions would reveal that he wasn’t being truthful. He never followed through with the plans to go out on a date and he became distant. He even ignored you when you called him and texted him later on. These are not the signs of a guy who really wants to be with you.
I know that you really like this guy but he just doesn’t feel the same way about you and he has shown you that repeatedly through his actions.
He has now blocked you on all social media which means that he is hoping that you get the hint that he doesn’t want to be with you.
It is best for you to take the hint and move on.