Coming out.. again?!

Samie

So I think when I was around 13 or 14 I started to date girls and I started to get really interested in them in more than a “friend” way. My mom & I kinda fought over it bc she was raised in a catholic lifestyle and I guess me only being 13 or 14 she just didn’t believe me or I don’t even know. But I just really wanted her to accept me and all that. I only came out to my mom bc my dad is out of the picture. My mom had told my step dad about it and they talked about it I guess. And that was it. I basically just got a big NO in my face and to leave it alone... so I did. I let them forget about it and just not speak about it and all of that. I’ve met a girl now that I’m 16 and I’m really serious about her and I’ve talked to her mom and her family knows about me but I feel bad bc my family doesn’t know about her. Only two of my cousins do. I want to bring her around my family and show her off like she does to me but I’m scared if I bring up the subject of me being bisexual and liking girls more and me having a girlfriend I’ll get shit down again. I just need advice on what to do. I want my mom to be okay with her. She kind of knows about her but she thinks she’s only a friend. Please help ! What do I do ? How do I approach my mom & what do I say ?