Gilbert Arenas thinks it's just a matter of time before Iggy Azalea and Nick Young are all good again ... saying she'll definitely forgive the Lakers star, and the all-important bachelor party is a GO.
Arenas -- who is ex-teammates and best pals with Young -- was leaving the Laker game when we asked his thoughts on the fate of the Iggy/Swaggy union.
As we previously reported ... the relationship is hanging by a thread with sources saying Nick is trying feverishly to fix everything destroyed by D'Angelo Russell's bro code killing video.