I feel like dumping my girlfriend right before finals finish up.
Why would you dump your girlfriend specifically before finals?
She's clingy and would distract me from studying during that time.
If you're otherwise happy with her, then just have her leave you alone during finals. If you aren't otherwise happy with her, then why wait until then to dump her?
I want to see her reaction, I can't stay with someone who I don't love. It would be cruel to do so.
I agree, it would be cruel to stay with someone that you are not interested in. I would recommend letting her down easy and that way you can get back on focusing on your finals.