No confidence 😣😖😥

So my other half birthday is coming up we been together for 4 years and have a 7 month old baby together I find it so hard to love my body and myself I have a mummy tummy and starch marks don't get me wrong my other half loves me and my body it's just me I want to do something for his birthday and dress up for him as I have never done it I know he will love it.... It's just having the confidences to do ( sorry if I spelled some things wrong ) any advice or tips be much appreciated