To be in love with someone is to feel you need them in order to be yourself. Or rather, love is the feeling that without the other you can't become who you are supposed to be. Of course, your love may be doomed. Many loves are not to be. The misery of lost love is, literally, the feeling that you can't become who you are. To "get over it" is to accept that you're not who you thought you were. This frees you to pursue others—other others and other selves.