I need some advice..?

I'm with this guy now that i've been with for 2 years.. after about a year it seems like he is tired of me never wants to you know do things in the bed, and i'm a cute girl it's almost like i'm neglected from his life. I still love him and I tell him it doesn't seem like he pays much attention to me but he doesn't believe me. he still buys me things but it's not the same as showing someone how much you care by being with them. I started talking to this other guy who is in the marine corps right now. we've been friends since my senior year of high school. and he's really sweet and thinks i don't deserve to be ignored, i know he would treat me right because he's a really good guy.. he thinks i should break up with my boyfriend for him but i just don't know what to do.. i feel like i still love my boyfriend but i think it's just because the relationship lasted for a really long time and it's hard to let go of it... i need help as to what i should do.