My parents and sister say they will disown me if I marry my boyfriend; what to do?

Oh JJ, I Feel for you! It sounds as if you truly love your boyfriend and your family, and are being torn in half! The answer to your dilemma lies within your own heart. Although I will offer this little bit of advise. Really sit down and have a heart to heart with your family, find out if their dislike of him lies in anything except for the superficial (height, you can do better type of thing). I do understand their concern about him being muslim, with all that is going on in the world, and you didn't mention what religion your family is. Would he be willing to convert (not necessarily to your family's religion, but away from Islam)? If the two families objections are only superficial, they will most likely get over it, if you two are married, and especially if you have children. But if the roots lie deeper into his morals, his treatment of you, or his openness to them, then you may need to take a second look, because sometimes people on the outside looking in can see things you can't. But either way, however it turns out, wounds will heal, and most times a parent or siblings love can not be put aside because of disagreements. But it does sound as if you have very little self esteem, and I ask you to examine your own motives. Don't get married because you feel like he is "the best you can do" or settle for someone you are not truly sure is right for you, because of your self esteem; weight or otherwise. You are a precious child of God, and God doesn't make mistakes. Appreciate yourself for who you are, and look to your inward beauty as well as your outward beauty. I hope things work out for you. Be strong, Pray, and if you truly feel your life lies with this man, then marry him. It is your life, but just have an open heart to hear the true concerns of your family first. God will light your path on what is the right decision for you! Good Luck!