What is the difference between 'I will meet you' and 'I will meet with you'?
I will meet you
There is a difference: I will meet you or I'll meet you, could mean all kinds of things. It could mean that we're going to have a meeting, and we're going to do some work together; but it could simply mean that's where we're going to see each other, and we're going to go and do something else afterwards.
I will meet with you
'I will meet with you' does imply a number of things: it implies that it's quite formal; it implies that it's very professional reasons and it implies that somehow, we're going to collaborate on something ...and that it will go on for quite a long time.