What's the difference between just and only?
"Just" and "only" are really close to each other in meaning.
To mean simply or merely you can use either: I didn't mean to be rude; I was only/just trying to help.
To mean something that happened a little while ago, use just: It just started raining.
To mean an amount that is not very much, you can use both, although only is more common: I can't afford it because I only have £5. / I can't afford it because I just have £25.
Hope this helps