"I'll definitely text you later" but I never do and I have a reason for that.
I used to try to drop hints such as "I dont think I am ready for a relationship" and "I dont want you to wait for me and waste your time" but every single time the girls would just get really clingy and start to message me 24/7 like we are in a relationship.
The thing is that dropping hints gives people hope, but saying the truth, "I think you're ugly", is just too cruel, and I cannot do that. I have found that ghosting out is the best thing for both of us. It gets the girl off my back AND she is able to move on faster thinking that I am an asshole who isn't worthy of her time.
If I lost my respect in her , I'll still be nice so she can leave and then block her number. I did that a few times Because the girls were too drunk that i lost any type of respect for them to give them a response.
Well, hopefully the girl would also feel that sparks weren't flying that night, so hopefully she wouldn't bring up meeting again or staying in contact.
I know I would refrain as best I possibly could to even hint at meeting again. I would mention something generic, like "Yeahhh... the lazer tag was fun" (I always aim at keeping first dates as activity dates). If she were to mention going out again I would try to avoid it; trying to change the subject until she would get the idea.
Alternatively I would smear chocolate on my forehead and let her think I had shit on my forehead ;)