live a life... file an annulment. talk to your boys and explain your side (go to the school and ask the help of the principal para maka private talk mo ang sons mo).

always provide your kids means to contact you in the future - like a private email or a telephone number. someday your kids would want to talk to you and "hopefully" understand the reality.

if you try legal ways, ikaw ang talo malamang - although with a very good lawyer you can probably have visitation rights... but then again it is plain war with the in-laws and wife... so why would you complicate your life?

i doubt whether your in-laws will side with you kahit na mag-explain or kausapin mo sila. personally, i think it is a "damn-if-you-do and damn-if-you-don't case".... so simply admit and submit to the situation - annul your marriage and make a way to make your life a little better and sweeter.