<human>: Can you succinctly summarize the text in 1-3 sentences?

So my girlfriend and I are in a very loving relationship. I love her. She loves me. I am there for her all the time. We do awesome things together. I try to be romantic as possible. Surprise flowers, love letters, etc. I do things for her. I installed a car stereo for her. I take interest in her interests.  I know that she loves me but sometimes I get the feeling that she isn't in love with me. 

I think that I strive to be the ideal boyfriend. I look after her needs. Her family is important to her and so I try to be there for them. The sex is good. I want to be the man in her life that she can count on no matter what, and I feel like I'm doing a great job of that. I'm not afraid to admit that I am a great guy however this does make me feel insecure. I want to give her the world but sometimes I feel like the world is not enough though. 

 Cheese ball lines aside, I want to know what other women think. If you aren't in love with someone, can that change? How can a man do more to make a girl fall in love again. I'm not willing to roll over and die here. How do I make a girl feel like I'm the love of her life again?
<bot>: we love each other but I don't think she's in love with me anymore. Anything I can do to respark that love? Is it even possible?