Is it worth it?

im protective of my stuff due to the fact that I dont appriciate people takeing or using without asking...im faithful in my relationship to my fiance. every day it seems like I am in tears because he continually doubts my faithfulness to him, even when i am able to prove to him his wrongs and my faithfulness. I cant visit my parents, talk to people on the phone, or notice people in everyday surroundings without him accusing me of lying, lusting over someone else who i will Never see again, or always needing to know what im doing..I love him very much and i know he loves me, but these constant accusations keep occuring and when I feel like I cant continue in the relationship he tells me I would rather put the relationship into jeoperody rather than solve it...I cant be anything Honest to Him but I am tired of the doubt...hes the man I want to marry but is all this worth it..I dont want a marriage of doubt...