Just make sure you don't exchange pornographic (i.e., naked) pictures. No sexting. It could be a big problem as you are under 18 and could subject...

Yon need to hire an immigration lawyer in the USA.

Any issue such as this would have to be handled by a Dutch court. Hire an attorney in the Netherlands.

This is a Canadian immigration question. Contact a Canadian immigration attorney.

Ask the Mexican consulate or embassy.

If they work in the Philippines they should have a corporate presence there. Hire an attorney with international knowledge and proceed.

Move to partnership. It is a partnership and perhaps tax question.

Hire an international attorney or accountant to fid your answer.

Ask the Danish embassy/consulate. They'd know.

This is an immigration question. Pass to that area.