One of the most common interpretations of a green heart from a boy is platonic love. This is the kind of love that you feel for close friends and family members. It is a deep and abiding love, but it is not romantic in nature. If you are friends with the boy who sent you the green heart, it is likely that he simply means to tell you that he cares about you and values your friendship.
While a green heart can be used to express platonic love, it can also be used to express romantic interest. However, this is less common, especially if the boy and girl are not already dating. If the boy has been flirting with you or showing other signs of romantic interest, then sending a green heart could be his way of telling you that he likes you.
Finally, a green heart can also be used to express appreciation or support. For example, if you have just posted a new photo on social media and the boy sends you a green heart, it could mean that he likes your photo or that he is proud of you for something.
The best way to figure out what a green heart from a boy means is to consider the context of the message. If he sent it after you told him about a personal achievement, it is likely that he is simply expressing his support. However, if he sent it out of the blue, it could be a sign of his romantic interest.
Your relationship with the boy is also an important factor to consider. If you are just friends, then it is more likely that he means platonic love. However, if you are dating or have been flirting, then it is more likely that he means romantic interest.
If you are unsure what a green heart from a boy means, the best thing to do is to ask him. You can simply say something like, "What did you mean when you sent me the green heart?" This will give him a chance to clarify his intentions.