No. You either didn't read my original post, or brainwashed by modern "jealousy = no trust" shit. Protecting your own has nothing to do with lack of trust or confidence. It's just a sign of being healthy.
Returning to the game. MC is jealous not only about his GF playing with some dude without him (which is not a good sign by itself, btw). He is jealous of her receiving expensive gifts from other man. It is a valid concern. And if a girl tells you that you shouldn't feel jealous (when any healthy male would be jealous), she is saying that she is not seeing you as her man. It is that simple. And if you agree with her, it means that there is no reason for her not to fuck around - you are not her man and you'll look away anyway. See? It IS the same.
And later, MC should have been jealous with her ignoring (without telling him) his stated discomfort of his GF being alone with her slut friend and aggressive male obviously targeting her. Later, when Jamal was hugging his giggling GF at the park, MC's lack of jealousy has only one meaning - "go, fuck her, I am either dumb, or spineless, or OK with that"... Her repeated "I have to tell you..." and then stopping halfway is a sure sign of lies and lack of trust on his GF part... Dude, if you really think that MC has no reasons to feel jealous in the game, i have to congratulate you. You are a cuck incarnate.