I've been thinking about this. It's really like an addiction with me.
Once I've been flying, I feel just fine. In fact, I think it's the feeling after flying that I really really like; having flown is in some ways even better than flying. And then, although I'm always happy to fly, I'm fine...for a week, maybe two. Then I start getting restless. Especially on sunny days. I start watching the weather forecast, finding reasons why I really really need to fly to keep current. I usually manage to go flying when that happens, and that starts the whole process all over again. But if I don't, the feeling lessens. In fact, after a whole month, I almost believe I'm cured, that I don't really care whether I fly or not.
But only almost. The slightest thing - the sight of an aircraft, passing an airfield, the smell of Avgas, most particularly the sound of a helicopter, brings it all back, and I just HAVE to fly again.
And then of course I'm hooked again and it starts all over.
Is it like that for anyone else?