Naruto would probably be initially shocked. He's a very loyal person, so he'd have a hard time believing it at first. Then he'd likely be very angry. He has a temper when it comes to things that are unjust, and this would be a huge betrayal. He might also feel really sad and disappointed in himself for not seeing the signs earlier.
He could react in different ways. At first, Naruto might try to find reasons to excuse his girlfriend's behavior. He's an optimistic person and would want to believe there was some misunderstanding. But when the truth really sinks in, he would be devastated. He might isolate himself for a while, not wanting to talk to anyone. He might also lash out at his friends if they try to console him, feeling that they don't really understand what he's going through. Eventually, he would have to find a way to move on and regain his confidence.
Naruto would probably be heartbroken. He loves Hinata deeply, so finding out she might have cheated would shatter him.
In the long run, Naruto might try to find a way to redeem those who cheated on him. Despite the pain, his kind heart would still hope for the best. He would likely try to understand their motives and see if there's a way to fix the broken relationships, while also being more cautious and less trusting in the future.
Naruto might be initially shocked and heartbroken. He is someone who values loyalty and friendship deeply, so being cheated on would be a huge blow to him.
His friends would be shocked at first. Sasuke might feel a sense of responsibility to find Naruto and bring him back. Sakura would probably feel guilty, especially if she was somehow involved in the situation that led to Naruto being cheated on.
Naruto would likely go through a period of sadness. He might cry alone, feeling like he wasn't good enough for Tenten. This could lead to a downward spiral of self - doubt, but his positive nature might also start to fight back, trying to convince himself that it's her loss in the end.
He often reacts with shock at first. Naruto has always been a character who values loyalty and friendship deeply, so when faced with being cheated on, it's like his world is turned upside down.
I think Naruto would be heartbroken. He's always been so open and sincere in his feelings. When he discovers Ino has cheated on him, he might go on a bit of a self - discovery journey. He'd wonder what he did wrong, even if it wasn't his fault at all. He could also become a bit more cynical about love, which would be a big change for him. He might start to see the world in a different light and be more guarded in future relationships.
He could then feel a deep sense of anger. Naruto has a temper, especially when it comes to those he loves. He might vow to find out the reason for the betrayal and make things right, or if it was truly malicious, seek revenge in his own Naruto - like way, which would involve trying to understand the person's motives even while being angry.
It would likely make him more jaded. Naruto has always been an optimist, but being cheated on could shatter his trust. For example, in a crossover with 'Dragon Ball', if his love interest cheats on him with a Saiyan, it could make him question his own worth.
Naruto's character would likely become more withdrawn. He's used to having people around him, but now, with everyone against him, he'd be more guarded. For example, he might not be as quick to trust new people.