Search Results: acting like someone else

So we have been together for over 6months and we do have our ups and downs.
He would call me every night just to talk about our day and all of that stuff and I dont mind this at all. But sometimes he would call me at random times like at day time or in the evening and sometimes Im doing something else so I can't pick up the phone. Whenever I dont pick up the phone, he would text me so many messages saying "what the f**k is wrong with ur phone? or are u tlking to someone else?" and he would call me multiple times.. and then when I look at my phone, I called him back and told him I was doing something else or talking to someone else. I asked him why he was so mad about me not picking up his calls.. and he says he's paranoid. and i asked why he's paranoid? and he replied "im just paranoid why ur not picking up ur phone. thats it. but im not thinking that you're talking to other guys. i just want you to pick up my random calls not just at night"
like wtf? am I in the wrong? why is he acting like this? doesn't make sense how he's paranoid... im so confused...