I think he is cheating in me?

I don't have anything based on it or any proof, but I just have a feeling that he is cheating on me not sure why
Whenever he hangs up the phone or don't answer my calls I just think he is talking to someone else.

I have never ever been paranoid or overthinking like this. In any of my relationships I always let it be as it is and never doubt or suspect anything except this time I Don't know why.

He once asked as a joke if he talks to another girl would he be a cheater and i told him if you ever wanna do that , its okay just let me know and we will have a clean break up a peaceful break up where no one hurts the other. And he said that there is no way he would think about anyone else while he has me in his life

I just can't get over that feeling or be relaxed I can't have a full trust in him and i can't talk to him about it i have nothing to explain to him why i have such feeling

I do like him and love him a lot
I think he is cheating in me?
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