Paranoia?

The background of the story: I have been in a long distance relationship for 6 months and have been talking with him for 8 months and we met online (people who are against ldr, please do not criticize). We even met once for 5 days, he also met my parents then and was exactly the person he seemed to be when we were video chatting. He took care of me, didn't and doesn't pressure me with anything , nothing is suspicious. He accepted to be again the one to visit me the second time and to stay even more. Sends me photos, gives me plenty of details about his day and everything.

His background: He is studying medicine and is the member of some charity and medical associations, involved in many college things.

My problem: sometimes I'm getting paranoid (and when this happens I even laugh at myself for such irrationality) and start to question myself : what if he is a sexual trafficker or a criminal or even worse, he is not real? This is incredibly crazy because I have no evidence on that. I documented myself online about his family, his past and criminal cases, friends, colleagues, places of work, places he's lived in, nothing is suspicious. Absolutely nothing. My parents even met him and consider that he is a nice guy, my friends as well. But why do I have these thoughts sometimes, under no evidence, not even in his behaviour? And when I think that I'm planning to go to his country to continue my studies there and me to move there with him or when I think that I will have to go and visit him once as well, I start to analyze every possible situation and then I just laugh at myself for such crazy thoughts.

May it be because of the technology and the lack of physical closeness?

Is this paranoid?

Please respond without any mean comments , this is really messing up with my head. I even had bought a paralyzing spray before we first met because I had to be prepared for anything and then i felt ashamed for the thought when i saw that there was nothing to be afraid of...