Been with dp four years and have a 12 month dd.
About a year in when were were arguing a lot he stated messaging girls on facebook, asking how they were, are they still with there bf? Nothing untoward but it made me feel uncomfortable - I felt he was fishing as it was basically ' hi xxx, how are you? Are you still with your boy friend?
I found these when we had got back on track and after a row, put them to back of my mind.
Fast forward to now, generally we have had a fun, happy relationship, very tactile. Although I was tired most of the time and didn't fancy making love, it dropped to once a week. He said I didn't fancy him any more he got really upset snout this one night and part of that is true but I think that's more down to the fact I don't respect him as much because I feel like I'm having to look after him like a child.
We had an almighty row and he walked out for a week.
During the week he called round to see dd and I asked to check his phone as I had a feeling he had been messaging girls again. He wouldn't ket me see and walked out.
We eventually sorted it out and he admitted that he had messaged a girl but It was work related but he deleted it 'as he knew I would get mad' 
I asked him how he would feel if I deleted messages he wanted to see - " he said he would walk and I deserve better" 
We both discussed we didn't want to split up. But nothing's changed. I feel angry he left us for a week and got to walk straight back in. I don't trust him. I dont trust the way he feels about me any more. Think he is here just for dd.
He used to kiss me when he got in from work and ask how my day was. That doesn't happen now.
This morning dh just kissed dd and walked out . He only really cuddles me in bed when he wants sex but I'm no where nearly in the mood for that.
I just feel like he is going through the motions.
I want us to be in that good place but it's like the spark has gone. I don't know what to do.
Any wise words?