My boyfriend stalked me before we got into relationship, should I be worried?

So today, my boyfriend admitted to basically stalking me before we got serious. In this time we only saw each other once on a club, and texting via instagram from time to time.

He went to my hometown (around 40 min from his home) bc he was jealous of me being in a club. And I didn't even know that..

And he also admitted to being to my hometown a couple of times, just to chill and see if he could see me.

Is this cause of concern?

My boyfriend stalked me before we got into relationship, should I be worried?
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