Could he be the one (please read)

I've been with my boyfriend for about a year a half. He's about 10 years older than me (25 & 36). He has 2 teenagers and I have a 2 year old that calls him daddy. I love our family dynamic, I love his kids and he is so good to my daughter.

However, since moving in together (about 3 months ago), I haven't felt in love with him anymore. I love him as a person and I think the world of him. However, I dont feel in love with him anymore. I feel content with him and that's about it. Is that how relationships are when theres kids? Or is he not the right one..?