I'm going to choose a girl from tinder over the other
Why are you picking one girl over the other?
Because I'm a superficial person and I just want to have fun
It is great to have fun but you should consider other peoples feelings. They will feel hurt if you lead them on thinking that you are looking for a relationship.
Having fun is part of being a human being. I'm not feeling bad about this.
Having fun is good but not at somebodies expense. You should be careful about leading a person on. You could be hurting them if you are not clear with them.