Most Helpful Guy
First of all, you have the wrong definition of the word "slut." That's the definition women would love to have you believe is what a "slut" is. It's also the definition butthurt resentful guys you "didn't" have sex with would like you have you believe is the accurate definition of the word. As the saying goes, "A whore sleeps with everyone, a slut sleeps with everyone except you."
The word slut originated in the 15th century in England. In Middle English, the word first appeared as "slutte," which simply meant a woman with no virtue (i.e., an "uninhibited" woman).
Around the 18th century, the British replaced the word "slutte" with a more formal version: "slovenly." When used to describe a person, slovenly simply meant "untidy, especially with respect to personal appearances." In other words, a sort of disheveled and messy look. When used to describe a young woman, however, slovenly mean "without regard to her image or reputation." In other words, this was a woman who acted without having a care in the world about how others would perceive her or think about her.
Compare and contrast the word "whore" or "prostitute" from "slut." A prostitute (or, "whore") is a woman who exchanges sex in return for things of value. By contrast, a slut is a woman who is sexually honest and uninhibited. Can a woman be a prostitute but not a slut? Yes, if she keeps her prostitution business on the down-low because she's concerned about people finding out. Can a woman be a slut, but not a prostitute? Yes. Think of yourself as a perfect example.
You were already paying this man money to help you move. You weren't getting anything extra of value from him in exchange for the sex you had with him. All you were getting was sex. But even then, notice how "sluts" are not necessarily "easy" or even "promiscuous." Neither of those things are within the definition of the word! It's not like you did this with just "any" guy who walked through that door. This was a hot and really good-looking guy, who also felt comfortable and confident enough to flirt back with you. The slut has a high bar in terms of what she wants sexually from a man. But, unlike inhibited women, as soon as she finds a man who satisfies her standards and has what she's looking for, she doesn't give having sex with him a second thought (hence, uninhibited). Lastly, she doesn't need to find 100 hot good-looking guys to have sex with in order to be a slut; she just needs to find one. What defines "slutiness" is "lack of inhibition regarding sexual activity," not "promiscuity."
So, yes, you were slutty. But, so what? Is that really such a bad thing?