Just need some input

Just wondering what is deemed to be a healthly sex life that is good for the relationship because i thought a lot of people like having sex at least once to twice a week at the least if you can fit time in for it. Well we started out having a pretty good sex life and had sex like once to twice a week but the thing is in the year we have been together his sex drive has went down a lot and we only have sex with me on top or side ways i cant seem to get him to do anyother and i have tried getting him to try others like i love doggie n we have done it like maybe 5 times no more then 8 and i have went down on him a few times but he says it feels weird and doesnt like it and im one of the few girls where i miss doing it. And dont even ask about the last time i had anyone go down on me because. He hasnt at all he doesnt wanna even finger me n he has like twice maybe. I have tried to talk to him about it and try to get him to talk about it to me. I do masturbate a lot n i have the toys to prove it so i get off on my own and sometimes he does get me off and i do love him n we are engaged. And the more i try to talk to him about it or ask for sex the less i get it. Like i try to masturbate less to say hey i want you not a piece of rubber plastic and i never masturbate in front of him or even when he is in the house. Like instead of sex dreams i have dreams of having sex with my vibrator and god did i feel like a reck when i woke up and no i dont masturbate every day or do it like to the point its all i wanna do i do it do relax every now and then but seriously i been in relationships. Where i had sex every day and now i feel like am i even wanted ? Am i sexy or am i beautiful? Im freaking 19 years old