Help !!!

So I just recently got out of a relationship after 7 year. I have a coworker I new for 1 year me and him get along really well and I always thought he was cute. I know he knows I like him . And I know he knows I know he likes me . Well anyways we spend all day together at work we are stuck like clue . And while we were working he ask me if I had a boyfriend I new where he was going with this cause he ask me out atleast 6 times since I new him right after I said no and had ask me out . The thing is I blew my chance cause instead of saying yes I started laughing and someone interrupted us I wanted to say yes but I was just caught off guard . Ever since that day he been ignoring me and hasn’t spend any time with me . I’m trying to figure out why this time he’s ignoring me cause I’m not going to lie all the other times I always said no cause I had a boyfriend . What’s so different about this time ?? Could I maybe hurt his feelings or am I over think ! Help