Those are some serious words of kindness, my friend.
I do what I can to give my insight to people in need, but you seem to be doing quite an outstanding job of this yourself~

Thanks for the time, it means the world.

Out of my own personal insight on this predicament, my friend, there’s always a time to love, and a time to let go.
While I do feel you have every right to holster envy of your friend’s newly found affection, you also need to realize that both of your accomplices have every right to enjoy their lives as much as you. In the departing of your recent relationship, you set his eyes free to new horizons, and the choice of whether or not he takes the initiative to move on should be left to him alone. 

Love can be painful, but you need to let him go until the time for your love ever unveils itself. In the mean time, don’t be discouraged to take the same initiative and enjoy some new experiences with different people; life’s too short to be stingy, so enjoy the little things while you can, my friend.

The nerve of some folks can be overwhelming at times, my confidante, but dare not let this dampen your outlook and efforts. This one’s to you, and hopefully you’ll find it in yourself to make the best possible decision on behalf of your comfort and welfare.

Dear Friend,

While it’s a reality that some bodies are simply rotten to the core in the dance of ethics, it’s notable to say that it will always take two to tango. Perhaps if one such as yourself doesn’t deserve such an irrational partner, then one ought to seek out another better suited to their style. 
The feeling of emptiness may appear disheartening, but I urge you to recognize that bad company is never a great supplement for the lack of any company at all, as your feelings of discontent will continue to branch out in a parallel fashion, with or without your current cohort.

The beauty of companionship is that one can always choose whom they associate with. In your case, my dear friend, I urge you to make haste in turning the tables! 

Because as your friend, I know you deserve better. 

While it’s unsettling to be in such a situation as this my comrade (as I have been previously), I wouldn’t be so dapper to say your life is over just yet. This one’s to you, and I most certainly hope it helps.

Dear Friend,

The curtains may seem to close as this drastic event comes to an unsettling end, but think of it as a continuation in your life’s exposition rather than its premature resolution. Bear in mind that you’ll always be the same person, friend or friendless, and the loss of your current cohorts fails to verify what your future may bring. 
Whether or not this was the consequence of your actions, however, be aware that your true companions won’t let the veil of an atrocious altercation shadow over something as timeless as friendship itself. 

You may face tough times ahead, my dear friend, but don’t let this deter you from finding new companionship along the way. You’d be surprised where an open mind can land you ultimately.