boyfriend won't even let me touch his phone..

caitlynmae • 17 years old
So the background story I've been cheated on in my past relationship and found multiple messages on his phones ect my current boyfriend cheated on his ex girlfriend ...
so all of this in account i started a new slate when me and him got together I wanted to forget about my past and his and trust him..
sounds rather silly but we play the same game on our phones so I just picked up his phone to go on it to play the game he was having none of it took it off me and hid it under his pillow.. obviously I questioned this and he had the cheek to say "ask any of my ex girlfriends I don't like them going on my phone" I was so close to saying yeah because you cheated on your last but that wouldn't be fair..
I mean we've had an argument about how I think he's got something to hide and I can't trust him as he gives me reasons not too and he just kept replying with he wouldn't be with me if he wanted to talk to someone else it's "too much hassle" 
it's not as if we are in a broken relationship it's perfect in my eyes all apart from this little thing..? 
last night we went out for dinner with my mum ect ect !!! 
I NEED OPINIONS LADIES 
(maybe I'm paranoid or I'm trying to hide the fact something might be wrong idn)