Can you please help me remember the title of this manga?

Genre: Romance, shoujo?
Details: It's about a loose girl who wasn't so loose before. On a flashback, she said that she only became that way because she fell in love before with one of her classmates and they started going out. While they were going out, i think she was tricked by an upperclassman or so into going somewhere that isn't seen and that guy molested her. When her boyfriend found out about it, he thought she did it intentionally so he broke up with her. At one time, they met each other on a love hotel, each with a different partner. The girl was hurt but she pretended to be indifferent.

On the present time of the manga(meaning after the flashback), it is shown that the two are friends. And the girl calls that ex-boyfriend(who is also her friend) as "the boy who I only held hands with". He was special to her because for the other guys, they've gone all past holding hands.

Other remarks: I only read its first few chapters so i'm sorry that it's a bit vague. I think the manga's title is named after the girl protagonist but I'm not sure. If you know some manga that's even a bit close to the details, i hope you inform me. Thank you for those who will answer. It will be much appreciated.

Do you happen to know what year it was published? Was it an old manga (1990-80-70) or 2000's?

Yogoreteru Hima Nanka Nai fits your description.

Good manga

Sounds like No Free Time to Get Dirty.