15 month daughter only wants mommy

I have a wonderful family and I love my daughter very much. From the moment she was born I've tried my best to be there for her whenever she needed it. I took FMLA for 3 months, working in office only whem absolutely needed, and worked from home for another month before losing my job at the time. I watched our daughter while mom finished her externship for school, and have played a very active role in my daughter's life. I regret nothing I have done as a parent, (maybe except the occasional pluck when telling her "no, don't touch the electrical socket!?!"). Our daughter is breastfed and has been breastfed since birth. We did use bottles early on in conjunction so mom could get some much needed rest, however after I while she (the baby) just started rejecting them. That was around 9 months. She'll take them from others when we're not around, for example oursitter, and I had them teach me what they do to get her to take it. From me though she wont. She associates me with mom being nearby even when she isn't and will not eat with me. Now she seems to not want to be alone with me. Daiper changes, playing, even as comfort when mom is not around. I've read tons of articles. I've worked in mental health care and learned the stages of development. I know it's just apart of her growth and that I shouldn't take it personally, but it's still tough. I know she doesn't actually hate me, but it feels that way. Mommy went to the bathroom just now and baby immediately started crying. I patted her over, and when I held get she refuses to be consoled. If she's calm and I try to kiss her she pushes me away. If I pick her up she tries to climb away. I know it's apart of her growth, but it doesn't make it not hurt. And the worst advice I've gotten is "it's just apart of her development, it doesn't mean anything, just deal with it." That doesn't make it better. Even if it changes down the line, that doesn't make it easier now when it's happening.