someone是只指一个人吗Just because someone doesn‘t love you the way

someone是只指一个人吗
Just because someone doesn‘t love you the way you want them to,doesn‘t mean they don‘t love you with all they have.===前面是someone doesn't后面这里用的they = =我觉得有点奇怪
Don‘t waste your time on a man/woman,who isn‘t willing to waste their time on you.===【their】不是【他们的】的意思咩?
我也不懂,就问问看