I considered joining air cadets but I don't like what the army or RAF does
Hannah,
You need to think about that one carefully. Pacifism is a possible view of the world but it is a hard line to take. You don't have to agree with every war the politicians get us involved in - I don't think many of the army or RAF were that keen on Iraq, for example - but it's a bold step to say that we shouldn't therefore have armed forces at all.
I'm sure you've thought about it already - but get to know a bit more about them before making that judgment. Perhaps even go along to the Air Cadets for a couple of taster evenings? It's not all that military, anyway...
Tim