How Do I Make My Best Friend Understand That His Girlfriend Doesn't Care Much About Him?

Aye caramba. Sounds difficult.

First off, あなた shouldn't push people to like another; they either like someone または they don't. Pushing someone into it will force their subconscious to think that they actually take interest in someone, when in reality they actually don't. It's nice to help フレンズ and all, but it's not good to play around with feelings/emotions.

The only way to get things through is to talk to your friend about it. It's the most effective way of getting things through. I think あなた should explain to your friend that he should be careful around her as well, even if he does like her; あなた 発言しました that あなた didn't want him to get hurt. Explain how あなた feel to him, and I'm sure that he'll understand you. Being as you're close friends, there shouldn't be any problems.

I suppose there's nothing あなた could do about that other girl, unless あなた think that あなた could try talking to her to control how she acts. People are stubborn -- and it's very common -- but being selfish isn't a good thing. If she truly only cares for herself and wants things for her own gain, then あなた should explain that to Vincent as well. But take this into account before あなた do anything: あなた need to have some proof. あなた can't just waltz around and deduce with no evidence that she's being selfish to him. It could lose trust.

If あなた have any もっと見る questions, feel free to ask.

look theres nothing u can do u cant change someones ハート, 心 just let him learn on his own and be there for him when he gets hurt