Complex sentence: At this point, the narrator regrets not being open with his feelngs and ultimately realizes that his feelings will remain forever unrequited and that the only time he'll be able to dance with her again will be inside his head.
Split into simpler sentences: At this point, the narrator regrets not being open with his feelings. He ultimately realizes that his feelings will remain forever unrequited and that the only time he'll be able to dance with her again will be inside his head.