So I've been best friends with this girl since first grade. We did almost everything together.People used to call us "siamese twins" because we were practically inseparable. This year, she started dating someone. He's a mutual friend (we've both known him since third grade). I thought this was a good thing at first, because they're pretty much perfect for eachother. I don't think that anymore. Now she always ditches me to be with him, and the few times when she doesn't, she's like a different person. I really really miss her, and I don't really know what to do. Should I just forget her or try to talk to her about this?