It's consensual for two people to be together. It's not easy to get together. We should bless. Perhaps, in real life, I have seen successful cases, and some friends will happily say that as long as they are not married, everyone is fair and has the right and possibility to compete, which sounds very reasonable.
But have you ever thought that if she can walk with you, is it possible to spark with someone better than you? What were you then? The rise and fall history of "Little Three's successful counterattack"? If you can't accept this, you can also think so. It is often said that "a friend's wife can't bully". There are two brothers in the world, and there are plenty of fish in the sea. Why are you hanging on a tree?
What you can do is to make yourself good enough to exude attractive charm, to capture who she is in your heart, and to let the other person worship you with appreciation and praise, instead of being the chief culprit in successfully splitting other people's happiness!
After all, the law allows it, but it is not forbidden. In the face of the girl you like, it is much better for brave enough to love to miss it once than to regret it. Youth is precious, you can't tell yourself how to catch up with that girl when you are old. Of course, it is not difficult to chase a girl with a boyfriend. In ancient times, peers were always enemies. You need to be cautious, have enough courage and strategy to see if you are the one who laughs last.