Prosecutors have told the jury of seven women and five men that Mr Wellings used violence to "grind" down Ms Dawes such that she took her own life.
On the second day of the trial, Ms Dawes’s best friend, Kacie Valentine, was asked about what her friend had told her about her relationship with Mr Wellings.
Ms Valentine said she felt it "weird" that Mr Wellings had got a tattoo of Ms Dawes' name on his neck so soon after they met.
The court heard Ms Valentine later discovered the hairdresser had fallen out with Mr Wellings and moved to live with a friend in Dorset and was "back to her normal self".
But she then received a photo from Ms Dawes showing a ring on her finger and discovered Mr Wellings had proposed to her on a beach with a banner saying, "Will you marry me?"
She had said yes to the proposal, the jury heard.
Ms Valentine told the court on about five occasions Ms Dawes told her Mr Wellings had been violent towards her, leaving her with injuries.
These included a cut on her leg, bruises to her ribs and a black eye, she said.
Ms Valentine said Ms Dawes had told her that when Mr Wellings would attack her, he would say to her: "Hitting you is like hitting a man."
Ms Valentine said sometimes her friend would come and stay at her house because Mr Wellings would "binge on drink and cocaine".
The jury was shown messages from Ms Dawes to Mr Wellings which read: "Coke is what’s gone wrong. I can’t bring a baby up like that. I told you 100 times not to buy any more."
Ms Dawes told Mr Wellings the drugs made him "aggressive" but his message response read: "Come on. Sorry xx".
Ms Dawes replied: "No, I’m sick of you hitting me."