Physical connections before marriage are essentially banned for Muslims (forbidden). If you mean a girl and a male meeting secretly, dining out in a nice restaurant, making out, and so on, that's not permitted. But since marriage is about more than physical attraction, a Muslim girl can like a boy even if he isn't handsome or rich. The best way for a Muslim girl to find love is by helping other people, being kind, and having mercy. Only God can help someone who is truly seeking him in faith.