Bisexual

Hey people. I just wanted to say that I am a little scared because I am 13 and I am bi (and no it's not a phase) I want to come out to my family and friends but my mum keeps on making jokes like "Canon of you don't get a boyfriend then you might turn gay." I don't know if she is joking or not. I just wanted to hear your coming out stories or if you can give me advise to ease into the convosation. I am scared of what they will think and if they won't love me anymore.