I have two accounts. Is it possible to merge them?

Facebook does not allow you to merge accounts. You need to copy your profile content (e.g. photos, notes, etc.) and add it manually to your more active account. Unfortunately, there will be some things you cannot transfer, such as Friends and Wall posts. Once you have moved all information onto a single account, please deactivate your old account from the Settings tab of the Account page. Afterward, you can add email addresses and networks to your new account from the Account page. Please note that maintaining multiple accounts is a violation of Facebook's Terms of Use.