Need Advice for Frustrated sex life.?

At the beginning of my relationship my partner wanted do do sexual things a lot, mainly oral and hands and some sex occasionally. In her past relationship she said she had sex 3-4 times a week not including other things they may have done and it became to much of a routine for her.. But when she has not ever once initiated anything with me it makes me feel like i am not good enough for her, especially when she initiated it all the time with her last relationship.... what makes it different with me? With me she has NOT once initiated anything sexual at all even from the beginning, she does not even talk or joke about it like my friends and their spouses do. She claims I am good in bed and her friends have even heard stories, but the way she acts about it makes me think she is completely turned off around me for no reason. She says she just wants it to be special, yet in 3 months there has been no sexual talk or anything. Sometimes when I am in the mood I will try to do and say things to turn her on but she is always busy, makes up something to do or just isnt in the mood. she wont even make out with me unless I hassle her to.. I get the impression it is TOOOO INCONVENIENT or something... WTF? I put her hand in areas while we kiss sometimes and she says later because we have nothing going on and 2 seconds later she makes plans for something later.... I try to desingate time to horse around at night before bed and she just says I am going to be really tired after my long day of work... it is starting to frustrate me in many aspects because a healthy marriage contains a sexual things!! How do I make her want it? because I do!! and she seems content without it for the rest of her life!! How do I make her want to initiate this stuff with me?? rather than me trying with her and getting denied because she is tired, but yet she stays up chatting with her close friends on facebook or Ichat. it is annoying and making me emotionally frustrated, we have talked about it and she just says i am always busy and doing sexual stuff is not important to me, but it is to me! For me it shows love and affection because were so busy that just being together at home and not talking half the time doesnt cut it like it does for her... any adivce?Need Advice for Frustrated sex life.?
It sounds like someone in her pasted was to ruff or forced her to do things did not to do. Your going to have to be patient with her ask her you and her could side so time each for together.Need Advice for Frustrated sex life.?
Ok one of two things is happening 1) she's cheating on you or 2) there is something that happened in her past that doesn't make her want to do anything sexual with you (ex. trust issues). The remedy to both problems: communication, and lots of it. Talk to her about it and listen to what she has to say.