Is Lebanon friendly or hostile to the US?

It depends entirely on who is in power in Lebanon. When the Christians in Lebanon have more power, they pursue a more Pro-US orientation because they can see the US a security guarantor. When the Shiite Muslims in Lebanon, especially Hezbollah, have more power, they pursue a more hostile anti-US orientation because they see the US a shill for the Israelis. The US has a functional relationship with Lebanon, but no serious alliances, military agreements, or trade agreements between the US and Lebanon.