Hi!
You can apply for a short stay visa allowing u to stay maximum 90 days.
All the requirements are available at the Swiss Embassy in Manila's website.
And sorry to disappoint you but no one is allowed to marry while you are staying in Switzerland as a visitor/tourist. A different visa is needed to be processed so that you can get married in Switzerland and the requirements are also available in that website.
NOTE:
Your boyfriend can sponsor your whole period of stay and all expenses related thereto. He must mention that in the Invitation Letter and attach copy of his bank statement for the last 3 months as well as his pay slips. Also, it can help if he can get a certficate mentioning that he is of good credit standing and I guess this is available in the Canton where he stays. In short, he must prove his financial capability to support all expenses of your stay.
Fear not in the event that the visa application is refused. You can make an appeal to the decision.
YOU SIMPLY HAVE TO CONVINCE THAT YOU ARE NOT GOING TO OVERSTAY IN SWITZERLAND AND WILL RETURN BACK TO THE PHILIPPINES. ALSO, THAT YOU WILL NOT LOOK FOR ANY EMPLOYMENT DURING YOUR STAY.
Set an appointment when all your papers are ready. The visa application form can be downloaded via the Swiss Embassy website.
Visa Fee is PHP3,300.00 non-refundable.
Best to be early during your appointment day because you need to answer the questioner that can only be handed to you during the appointment day. Write the Reference Number which the call center agent will dictate to you at the time that you are setting an appointment.
Good Luck!
By the way, you can apply for a visa 3 months before the planned visit/vacation.