Ladies and Gents, the OP asked for ways to politely tell her friends and acquaintances that she was ready to see someone new and have fun, and not to worry about her. Please don't let this dissolve into a discussion about people's personal opinions on when is 'too soon' to date or what rebound means.
I appreciate everyone has their POV, but please either move it to a new thread or PM each other.
And now, back to the subject in hand.
A possible response could be:
"It's not serious, we're having fun enjoying each others company. Besides, the ending of my rel@tionship with X was mutual and I've had time to reflect".
Edited for spelling