fly high

verbs

be elated
"He was flying high during the summer months"
fly high
is a type of (narrower)
undergo an emotional sensation or be in a particular state of mind
"She felt resentful"; "He felt regret"
experience, feel
make steady progress; be at the high point in one's career or reach a high point in historical significance or importance
"The new student is thriving"
flourish, fly high, prosper, thrive