I would try and relax a bit more hun, you sound very stressed and she will pick up on that.
Lie her on a pillow or a breastfeeding cushion next you you, preferably skin to skin, if you are worried she'll get too hot or cold, sort out her clothing or a blanket first so she is less likely to be uncomfortable.
Turn off the TV, make it so there are no distractions, then just cuddle her next to your breast and see what happens.
With my friend we put a few drops of formula on her nipple!
My friend was really struggling last year, she called me for help and I found out she was giving up too easily and reaching for the bottle, her son would cry and she would think straight away that it wasn't going to work. I reasurred her that he wasn't THAT upset, just having a little moan, and within 1/2 an hour he was feeding from her.
She admitted that she had just been giving up too soon.
Do bear in mind if she does latch on she may want to feed from you ALOT over then next few days, this is perfectly normal as she will be trying to boost your milk supply.
GOOD LUCK, but PLEASE don't set your goals too high, you said you have been feeling very down recently, is this because you can't feed or are there other issues? You are at a very vunerable time and I would hate for you to feel like a failure just because breastfeeding didn't work out for you. Give it your best shot, but remember...you'll be a great mom either way.
Blimey that's the biggest post I've made in ages