My boyfriends mom is rascist !?

Ok so I'm datting this boy I'm black he is white we have no problem with it at school and that's the 1st relationship I've had with a boy that was white my mom has no problem with it but one day I texted him and said hey he says can't text right now and don't ask why so I'm lyk ok??? Lyk wtf so my friend texts me and says that he told her his mom wanted him to breakup with me and that she took his phone and I'm like how come and I'm just thinking she probbaly dosent want him having a girlfriend but come to find out that it was comepltley because I'm black :/ and she took his phone away so he couldn't contact me but what she didn't know that was he was is my friend on facebook but he won't tell me about what happned with him and his mom involing me because he dosent want to hurt me let's just say I'm very pissed about this and I would love to hear your thoughts over this and let's just say I have a bad bad temper and he's afraid if he tells me everything that ill cuss or call her out (which is most likely what will happen)