I have lied to my boy friend before about a few things and later I have admitted that I have lied to him and I told him the truth.. but I haven't told everything about the truth... is it okay if I ignore a few things in a relationship and keep things to myself?

Everyone is allowed there own secrets. To a degree...

When it comes to someone else emotions though and if you have done something to them that could later damage the relationship it is only fair you tell him..

But could you give me more detail as to what kind of things are you hiding?

If its. I have a horrible form of S.T.D yeah you should tell him.
If you have cheated on him you should tell him.
If you stole from him yeah you should tell him
If you killed his cat yeah you should tell him


But if you have some personal things in your life you don't wish to share with him. I don't see that much of a probable with it
A relationship is all about finding out about one another :)
And in time I'm sure everything will come up

To be honest, it really depends on the "things you've kept hidden"... I don't think a couple should tell one another EVERYTHING there is to tell (in my opinion, secrets just keep the relationship more sane) but if there are some things that you have done that involves the relationship (you cheated on him... you stole money from him... etc) I think you should definitely tell him.

It's a little complicated... when I was in a relationship with my boy friend I had feelings for one more person and got physical with that guy... and later realized my mistake and told my boy friend about it just recently and but haven't told him everything about it... as in.. I had got physical with the other guy 3 to 4 times and I have told my boy friend that it just happen one day and haven't told him no. of times it has happen.. is it okay if I hide the no. of times its happened from him although I have told him I have got physical and cheated him and realized my mistakes...

You felt guilty, was not completely honest, so do you still feel a bit guilty?

..
I personal think you should tell your boyfriend everything about that.

I would not be so forgiving. 4 times!
My god women.

I think you should tell your boyfriend the number of times
And you are feeling guilty
And you should feel guilty!

I agree your only hope from here on out is 100% heart to heart honesty. Not just about this but about EVERYTHING if you want even a chance at him really trusting you again.