Why do you feel that you have to do more? Seems to me you have a lot on your plate already being a young missionary in South America. Helping each other to be closer to God is what happens here. Glad to have you onboard with us. Welcome to CC.
There is nothing wrong with taking care of yourself. As for felling unlovable, just remember that God loves you. Glad to have you onboard with us. Welcome to CC.