John Mayer writing Jennifer Aniston a love song

John Mayer really wooed Jennifer Aniston back by writing Jenn a love song.

"John has even written a song about their time together and played it to Jennifer who was incredibly touched." Said A source.

"He initially called things off because he didn't feel ready for commitment."

"Determined to show he's changed, John has cut right back on his drinking and has pledged to quit smoking roll-up cigarettes - two things that really annoyed Jennifer."

After a considerable time apart, his priorities have changed and he wants to make a go of things. John realise how much he cared for the star and he reportedly began sending her romantic text messages in attempt to win her back.

"For a while Jennifer cut off all ties and refused to speak to him. But over the past few weeks, they've both realised how good they were together and how much they mean to one another."

"It's still early days and John is by no means off the hook. He has serious grovelling and making up to do."

John Mayer was also seen "sneaking out" of Jennifer's home last week, after the pair had been out for drinks with friends the previous evening.

We wait and see. :)