It's a phase. When I and my friends who also had a baby/toddler around the same age would get together, invariably, the other mom would have 2 kids (hers and mine) in her lap, crawling to her, etc. Their kid (nor mine!) would never come to me because of course most kids would go to their own moms, but mine didn't. :(
But last night he (7yo now) painted "I love you mom" for me and "I love you dad" for each of us. (And this was on the same day he wrote a note and tried to show it to a friend sitting behind us in church "I wish you were my dad") sigh/LOL.
Look on the bright side. You get to do things! Your husband can help unlike some who WANT their husbands to help but their kids wont accept it. Enjoy it while you can. Think positive and always remember, she DOES love you! Don't take it personally.