I'm planning to ignore that my friend's birthday is this week.
Why would you ignore your friend's birthday?
We haven't spoken in years and we've lost touch with each other.
I know you feel abandoned by your friend, but you should still reach out to them on their birthday. There may be other reasons why they haven't contacted you and they may really be in need of a friend right now.
I'm probably the one who needs help. I'm not going to wish him on his birthday.
His birthday is a great occasion for you guys to reconnect. I'm sure he'll be happy to be friends with you again.