I think Wulong is not in love with Mei Sheng, but the kind of feelings that dare not live up to. Mei Sheng and I have always been childhood friends, so this is the first time. He doesn't even know what love is. In fact, there is a direct story in it. When Johnny was ill, he came out of Johnny's house. In the car, Wulong asked Youxi why he liked the senior. Youxi couldn't answer, but Wulong said that if he liked it, he would be able to answer the question. However, when Youxi asked Oolong why he liked Meisheng in turn, Oolong couldn't answer. It shows that Wulong's love for Mei Sheng and Youxi's love for seniors are not true, but they are deceived by previous feelings or other emotions. Moreover, after the plot wins the United States to splash water on the young city, Wulong and Johnny drink and confess. Wulong said "it's good to be friends", which indirectly shows that Wulong doesn't love Mei Sheng.
Later, Youxi made Wulong really understand what love is.
Although the ending is a bit cruel to Mei Sheng played by ┮ ┭ ┭ ┭ ┭, if you really stay with Mei Sheng like that, maybe you will always be with Youxi in the future, and you might as well die. You not only hurt yourself, but actually hurt Mei Sheng in disguise.
So I think it is right for Wulong to follow his true feelings.