Why don't i want to have with my fiance?

We have been together for about three years. we have a beautiful one year old daughter together. When we were first together we did it all the time. Than I went through a spout of depression for a few months and didn't do it. than i got pregnant and we didn't do that whole time either. now i just dont want to have . i love him and care about him. i just odnt understand why this is happening. does it mean im not in love with him anymore? that im bored? should we split up? i need advice!!