I'm going to make up an excuse to leave a hookup in the middle of hooking up
What makes you want to leave the hookup?
There is no need for me to stay the whole night.
Well, imagine how the person you're hooking up with is going to feel?  You shouldn't lie to them about your intentions.  They'll appreciate you being honest!
So what if they start crying or yelling for me to come back? I want to go home when I'm done, I'm exhausted, tired, and just want to sleep at my own place.
Lying to the person that you are hooking up with is wrong. You should practice being more considerate of other people and their feelings. You can practice by respectfully telling your hookup what your intentions are from the very beginning.