I hate to love him

The father of my child is recently back in our lives (my fault not his). Well now I see him constantly because my toddler is completely attached to me and wants me every where she goes, but the problem is seeing him only made me realize the feelings I had for him have not dissipated. This slowly kills me because I am only trying to be around so he can enjoy our child. I want them to have a great relationship and ours to be remain as good coparents. I’m slowly losing my mind. He took a shower the other day after we went swimming and walked out of the restroom with a towel and I swear I drooled. I need to figure out how to stay dry!