Hi. No, that wouldn't lead to getting pregnant. Normally, it is going to take sexual activity such as intercourse and a penis in the vagina to become pregnant. But he definitely sounds like a jerk! I'd stay away from someone who treats you that way.
No_Name, I'm not sure the details you told planned parenthood, but a little bit of precum on your butt won't get you pregnant. Sperm need semen to swim around in, they don't just swim around on skin or clothing. They need to be deposited in the vagina with semen that helps them move up the birth canal.