Don’t regret it. Just put the money down, enjoy or learn from the investment, and move on. Cut your losses and figure out how to move forward. There’s no point at all in tarnishing a good evening by despairing about dollars and cents. Live the good life.
Why ruin a pleasant moment with ongoing woes or concerns beyond? Do not let the past or future overwhelm you. Easier said than done, but it’s all a matter of focus. Focus on the activity at hand, person in front of you, or space you occupy. Do not let your mind wander; give the present your full attention. Face stress only when you need to. It’s the healthier and happier way to live.