Facebook Account(s) related question?

[History]

I Have my school friends in my fb account.And i created another account for my college friends.And i do things such as liking or commenting in status' and in some groups which, i don't what to show it to friends of both the accounts. My privacy settings are maximum in both the accounts and i am in confusion how do i stop then from seeing my activities.Should i have another one? No thats not good. What should i do?
@jeyakumar n : its already private and i want to hide it from friends but u say friends only!
@RAY D: No account/friends is connect with one another.Account A consists of set of people A. Account B consists of set of people B.I Want to Like/Comment on pages of my personal opinion which i don't want to how it to any one. If i do so in any of the account it will be visible to anyone. So what i should i do rather than creating a third account

[jeyakumar n]

Click private or friends only.

[RAY D]

well dont connect one to another.
dont post anything on the facebook that the other group can see.
try changing the option on group views.
change what they can see.and when you post change who you share with.

[GINTO]

the only thing that you can do is to change the settings into private......and don't add any friend as close friend......(close friends are indicated with a yellow star)

[Abuzar]

There is no way to hide it. The comments you make on pages are by default set to PUBLIC. Any of your friend can see what you comment on a Page.