When attempting to figure out what you want to do for the rest of your life, talk to as many people as you possibly can. Also, find out what the future of that field looks like. Training for a job that won't exist when you get out isn't good. Ask faculty about their graduate experiences. Be prepared to hear some pretty awful stuff.
Many faculty have horror stories to tell.
Don't take it personally. The reason for telling you this stuff is to alert you to the fact that such things are possible and, in some cases, probable. They aren't trying to scare you out of going, they just want to go armed with the knowledge that bad things can and do happen. Now that you know that, realize that grad school can be one of the most stimulating situations you'll ever encounter. However, if you enjoy learning and want to expand your knowledge of psychology, grad school could be extremely fulfilling and rewarding.