Were you 2 tight before she met new bf? Did you have plenty of sex, dates, cuddles, romance? Were you getting along well in general?
Why is she ignoring you so much now? I know, NRE, but that is no excuse to be so uncaring about what you've grown to expect and love as far as attention... relationship! We don't need to go all tit for tat, but there does need to be some balance in time sharing, and she needs to slow down and remember you exist.
Love withers under constraint; its very essence is liberty. It is compatible neither with envy, jealousy or fear. It is there most pure, perfect and unlimited when its votaries live in confidence, equality and unreserve. -- Shelley
There's no lying in polyamory!
I'm a 58 year old woman with 2 partners:
miss pixi, my live-in gf, 36 (together since Jan '09)
Ginger, bf, 61, married, lives nearby (together since Jan '12)