I Love Him So Much And Im Scared To Lose Him

So me and my boyfriend have been together for 5 months but we have been like best friends for 2 years and I honestly love him with all my heart because I've never felt this way about someone. At first we we're scared to ruin our friendship but its to late now and i love him. When we first started dating it was great and now i still love him and i want it to work but I'm not sure if he does. He says he does but we have been getting into fights lately about the smallest little things cuz hes so sensitive and I feel like im hurting him and I don't want to hurt him. I love him so much I would die for him so no I don't want to hurt him. I'm kinda lost tho cuz if we end i dont feel like my life can go on. He has stuck with me through my dad leaving me and my mom and he has stayedthrough all my issues ans I just i cant stand the thought of losing him. I let him boss me around and blame me for everything and i know that sounds like a unhealthy relationship but im hooked now and i would do anything for him I just don't know what to do to keep him please help me. If you have ever really been in love the thought of losing the person you love would devistate you so you know how i feel cuz i can't lose him. I love him. I'm a sr im highschool and i know hes the one. He knows me so well and he has stuck around and I just know he's the one every little sign i ask for the answer is yes so I just I love him that's all i can say. How do i keep him?