I am scared I may have and/or are prone to a gambling problem. Read description & answer intelligently please?

I am in high school. I gamble with my friends when we hang out (blackjack, poker). Overall, I can honestly say Ive broke even through the years. The problem is that my bet amounts are increasing. I found myself often getting too emotionally attached to the games. Lately, I will bring $15 over and say that it is all I can lose, and will end up losing more in IOU's. While none of my losses have been too substantial, I go home feeling low and still have the urge to win it all back. I have said that I will stop, but got sucked back in. I understand that it is impossible to win over a period of time at casinos (too young, never been to one), and dont see myself being a regular casino attendant. I have my first job this summer, and it worries me that I will one day get caught up in gambling, mess up my life and experience lows to a way worse degree. I have vowed to not gamble with the money I make working. Anyways, do you think I have and/or are prone to a gambling problem.