I have been sleeping with a man for 2 weeks and would have clified him as my boyfirend but?

he says we are both still single and he wants things to stay like that and see how they go. He works behind the bar in our local pub and is 19 years older than me, he hasn't had a relationship for 10 years as his wife ran of with another man, he says he needs to learn to trust again, He said to me yesturday one of his friends phoned him up and said that i had a crush on him and was he "shagging me" and he just said so what if i am, i felt so embarrased by that comment when we haven t had yet. i am so in love with him but i feel like a cheap tart. please help me i am not the sort of person that casually sleeps with someone