This is a another way that Tex tells Ken that he loves Ken like a father and proceeds to ask if he would, if he could adopted him this seen is not the same as the seen in the comic "Dreamer" the words say

Ken: But I don't know how to be-
Tex: But would you?
Ken: . . . yes I would love to have you as my son, but-
Tex: That's all that matters I's just happy you said Yes