Relationships

So I've been talking to this guy for 3 months now and I couldn't ask for anyone better. He's so sweet and honestly I could say he's too good for me. I've only had 1 other serious relationship before and I still miss the memories and stuff from that guy but other then that I'm over him. So the guy I'm talking to me now really likes me and treats me like a princess. I'm 15 and he's 17 but I just don't know if I feel the spark anymore. He's too nice that I feel like he's too good for me. But I don't know I just dont feel the spark. Is that bad? I need advice!