Having intimate (With lots of flirting) one on one moments with your ex's friends would probably drive your ex insane with jelousy 
One thing I can tell you, the more of these break ups you have in life, the stronger you get. All other break ups get easier and easier to handle. It's kinda like learning how to ride a bike really
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~