I don't know if I love my boyfriend anymore.

So my boyfriend and I have been together a year and three months. I'm 20 and he's 26. He's ready to settle down and he wants children, that I don't want until I'm 30. I guess I'm a little scared of commitment. We're looking at getting a house together in October but I'm a little reserved about it. I do love him, but I don't know if I'm IN love anymore. He's lovely most of the time, but gets really nasty when he's sick, and he's quite jealous. This brings me to my best friend, he and I have been best friends since we were about 13 years old. We dated for a week when we were 14, nothing serious obviously! I feel like I'll always have some feelings for him though. I saw him last night and all I could think about was how he'd react if I just kissed him, and then I dreamt about him last night! I'm guessing I'm just looking for some words of advice! Thanks!