You shouldn’t give your crush a second chance. The only reason why he is back is for his desire to eventually hook up again.
Initially, he is acts as though he likes you as a person and wants to get to know you better. However, his true intention is to get you to lower your guard and open up to him again.
So, he plays nice for a while, taking you out on a few dates to get you all warmed up to him.
But, all of this is nothing but a smokescreen. Once you have lowered your guard, his true intentions come out. He wants another hookup, and once he gets it, he is ghosting you again.
This is the cycle that occurs when you are dealing with someone who has already ghosted you in the past. If he truly saw you as a potential partner, he would never have ghosted you to begin with.
Try not to let your emotions for your crush cloud your judgment. He mustn’t be given a second chance.