“I’ll be happy when” is a train that keeps adding stops.

Happiness placed in the future keeps moving. Once exams end, once summer starts, once you are out of this house, and each time you arrive the destination has quietly shifted to the next stop, because the pattern is the problem rather than the particular station. Nothing is wrong with wanting the next thing. The trouble starts when the present is only ever a waiting area.

Name the condition you are currently attaching happiness to. Then find one thing available today that you would enjoy even if that condition never arrives. Do that one thing before the week is out.