it's a terrible horned dilemma, isn't it?
having options is the best. but some of us don't. when my babies were small, staying home with them simply wasn't an option. my schedule looked a lot like yours. the hours were different, but the time-with was right about there.
and i too suffered greatly from guilt. and from just plain loving my boys and wanting more time with them. if i'd been in a great career that i loved i think the guilt and resentment would have been less, but i've usually worked dutifully, not from a place of passion.
i don't think guilt or resentment are healthy emotions for a mom to have or a child to experience second-hand, but it wasn't something i was able to turn on and off either.
that being said, we did our best to make it do-able. we had daycare we liked and trusted, and when there were incidents (my younger went through a bitey phase, for example) we all worked together to get through it. my kids were in daycare from 5 weeks old on so they didn't sweat it. like all kids they did cry sometimes when getting dropped off, and went mad with joy on the rare but wonderful occasions we played hooky from everything and had adventure days, but it didn't traumatize them.
the fact that you love your job is huge. don't minimize that.
obviously you love your baby far, far more. that's a given.
CAN you work less? will your household budget stand for it? does your job have some flexibility for off-kilter hours or part-time? will doing so impact your marriage negatively?
if it will derail your entire career, or put your financial stability in jeopardy, or result in no time spent nurturing your marriage, then do your best to love and comfort yourself through the guilt and carry on. if YOU are reasonably happy and confident, that's the best possible gift to give your baby.
if it's possible, though, to cut back at work and spend more time with your baby, do it. i have very few regrets about our wonderful parenting years (although i do have some, and they're doozies). i don't blame myself or beat myself up for having to work so much. that's simply how it was. but if i'd had more choices it would have rocked. i'd have LOVED to be a SAHM, or at least a Stay-At-Home-More mom.
khairete
S.