Feeling slightly inadequate or left out is normal. You may sense that you are missing something special, by not being able to feed the baby. You might experience a perceived (or real) loss of intimacy, as your lover's role is reframed... So, it is helpful to know there are many ways you can 'breastfeed' the baby!
If we look at what we as parents are actually trying to achieve - healthy, happy adults - we need to ask ourselves, does this have to mean sharing our beds with our children or letting them self-wean? I think not. Because what really matters, what is really absolutely crucial to healthy child development, is not 'Attachment Parenting', but 'Responsive Parenting.'