Guido,
When you say "you guys", who are you talking to? Are we not just part of your consciousness? Consider this: the fact that you pose this question the way you do, and that you expect an answer from us, isn't that a tell-tale sign of your doubt about your solipsism? After all, if you were really convinced of your solipsism, then this venue would not offer a solution, would it? Whatever we would say - or rather, whatever you would have us say - it would have come from your own mind.
Yet you try this in earnest. To my mind - and I assure you that it exists independently from yours - this means that you have doubts about your solipsistic thoughts. That's a foothold, you can use it to climb out of your predicament.
And here's another thing you can try. Consider your position in your thought-up world: you are not God, you are not the president, you're not even grown-up if I remember correctly. In fact, you are pretty powerless, you cannot change the way things are.
Now, can you think of a reason why, if your solipsism is true, your situation would be like this? Why isn't your world perfect and why are you not the most powerful being in it? The fact that your situation is far from perfect suggests an outside influence over which you have no control. That means that not everything is in your mind.
"Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science." - Charles Darwin.
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