A girl found messages sent by former Sunderland winger Adam Johnson "a bit creepy", a court heard on Tuesday.
Johnson is currently on trial at Bradford Crown Court over two counts of sexual activity with a child, which he denies.
The 28-year-old last week pleaded guilty to one count of sexual activity with a child and one further count of grooming.
The girl, who was 15 years old at the time the alleged incident took place, told the court that she had been showing off to friends about her relationship with Johnson, whom she claims she 'idolised'.
"I was trying to big myself up as any 15-year-old girl would. When you idolise someone and that happens to you, you're not thinking at the time. I wasn't protecting myself. It made no difference to me whether they knew about me and Adam Johnson. It was him who was going to suffer for it," she told the court.
"I didn't want that to happen to him. I saw myself as playing a part in it as well, I thought I'd done wrong too. I was trying to brag about it and show off about it. How many teenagers can say that's happened to them? I thought I was big and I thought I was clever. I feel so stupid now for not seeing but I didn't see it at the time.
After saying that she found some of the messages sent by Johnson "a bit creepy", the girl added: "I thought that when I told him my age he would have backed off. Who just asks for a random fan's number? Someone texting a 15-year-old girl - they're not completely normal."
Orlando Pownall QC also asked the girl whether she "absolutely hated" Johnson now, to which she replied: "Yes, I do, after everything he's put us through. He told everyone he was innocent and he made people call me a liar.
"He let people cheer him on in matches and he let people call me all the names under the sun."
On Monday, the girl said that she felt "compelled" to perform a sex act on the former England international while in his car.
