Relationship troubles

Me and my partner have been together nearly 4 years.

We have a 14 month old boy.

We don’t live together but see each other at the weekend which has worked for us when we never had our son.

I know things change after having a child but I just don’t know what is wrong with me.

I feel like our relationship is not the same and dunno how to make it work.

I love him but I just don’t know what is wrong with how I feel.

We noticed a few weeks ago that things were tense and we spoke about it. I noticed that I am very short tempered with him but explained why and that I would try harder to be a bit more patient. We spoke about doing more things as a family especially as he don’t see our son in the week and it’s hard for me to do things with him in he week as he goes to the childminder while I’m working.

I felt like after our talk things were ok, I am more patient but still get frustrated at times. He does do a lot more stuff and understands more what I have to do in the week. We do more things as family now. When we are out and about as a family I enjoy it but don’t know if I’m trying harder as our son is around.

Normally I go to his the weekend and he lives with his family. I like going as I know our son will see his dad and grandparents and I know I will get a much needed break. But sometimes I don’t feel excited as much as I use to. And my partner came here this weekend but before I could not wait for him to come but this weekend I felt like I did not care.

What is wrong with me??