What happens at the end of the day if you have been playing around having a bet? If you are deliriously happy when you've had a winning day, stop betting immediately. If you are sad and depressed if you have had a losing day, stop betting immediately.
Your approach to life and those around you should NEVER be dependant on whether or not you've had a good day on the punt and, if it is, you need to reassess where you're going with all this.
No matter what happens in the space of a gambling afternoon, it shouldn't dictate how you feel. It should be just a part of a normal day - win or lose - and life goes on.