How long does it take to develop feelings for someone?

Anonymous
I met this guy two weeks ago and since then we went on 4 dates. He is intelligent, sweet, kind to me, he has a nice personality and he is cute, but I kinda don't know if I like him or not. We don't share similar hobbies or interests, but every time we saw each other I had a nice time. I was usually really strongly attracted to my ex bf-s, but this guy was interested in me and he seemed really nice so we started going out. I don't know if I should end this now before someone gets involved or if I should wait a little and give him a chance. I don't know how long does it take to develop feelings for someone you weren't that interested in the beginning...
How long does it take to develop feelings for someone?
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