Most Helpful Guy
Interesting question. Well, hypothetically speaking, he might. It sounds as though he's at least interested, but doesn't know what he wants.
Most Helpful Girl
Yes I'd think he'd eventually go back to the girl he loves , quit running and contact her.
Hypothetically speaking let's say the girl he's dating helps him get over his phobia of commitment or emotional issues whatever he's having that's preventing his progression with the other girl.
Once he gets over that, why would he settle for the 2nd girl over the girl he loves?
At best she's just a stepping stone- preparation, helping him get his feet wet so when he gets the real thing he won't screw up
Maybe he will be greatful that the 2nd girl helped him and try to stick it out with her, but from the sounds of it his love for girl 1 is killing him inside and it's evident to everyone around him.
I wouldn't want to be the girl who prevents him from pursing his love nor would I want to be the person who gets used as a stepping stone because no one deserves that.
If I really cared for him, I'd let him go be happy with his love and find someone who will someday be as crazy about me as he was with the other girl.