Most Helpful Guy
I personally think you should give him the silence treatment, do the same to him, so he is aware that you're not happy with his recent behavior.
Most Helpful Girl
I find him Rude and Crude for behaving in this boyish way by Not being open to come clean with you to let you Know... Something is wrong.
These are all Raised Red Flags here, dear, of Someone who is this Cowardly lion and doesn't want to come right out and tell you it may be over, he would rather you see you sit home and Suffer in silence.
You seem to be your own detective and with the start of him Paining the town red until Last Sunday, now he is totally putting you on his pay no mind list as if to Hint with no hymning and hawing that... Maybe he met someone.
If he is Acting far from a pussy cat and more like a bozo, then give him your own walking papers and the Silent treatment, should he try to come back with already have barked up the wrong tree.
Good luck. xx