I have a lady that I love so much at college and at a particular time she went dating a close friend of mine. After our departure from school she came back and wanted to stay with me. What should I do because I am alrady in date with another lady.

Tell her NO.
She most likely will try to talk you into it but you don't want to jeopardize your relationship with rumors. Don't give her excuses because that will open the door for her to shoot your excuses down so just a simple NO.

For example:

You: somebody might see you stayed and tell my girlfriend
Her: I will sneak in when nobody is looking

You: say No because I don't want my girlfriend to hear a girl stayed here
Her: I promise I will talk to her and assure her nothing happened.

You: say I don't have anywhere for you to sleep
Her: I will sleep on the floor I really don't mind the floor

She turned you down easy enough, you can turn her down too.

Well, I was basically just toldvthat if you let someone go and the love is true, they will come back. I guess that she really dose like you. You know that saying, that god does everything for a reason. I think that this was a fine example. Now s your decision. Are you willing to take back someone that loves you. Or let her be. I have to make the same decision in a different foemat. So in a way, I know how you feel.