Jennifer Aniston's John Mayer sleepover

Oct 17, 2008, 4:00 GMT

US singer songwriter John Mayer performs in concert at the Verizon Wireless Music Center in Indianapolis, Indiana, USA, 05 July 2008. EPA/STEVE C. MITCHELL

John Mayer was seen "sneaking" out of ex-girlfriend Jennifer Aniston's house early on Wednesday morning (15.10.08).

The pair - who sparked rumours they had rekindled their romance after they were spotted passionately kissing earlier this month - enjoyed a romantic dinner at Los Angeles' Sunset Tower Hotel on Tuesday night (14.10.08), but went to great lengths to ensure they weren't pictured together.

A source said: "They left out the back of the hotel and were very discreet. Jennifer was leading but John walked very closely behind her when they left."

The following morning, John was seen leaving Jennifer's Hollywood home in his black Cadillac.

Onlookers claim John did "everything he could to sneak out of Jennifer's place", but he was caught on camera by waiting photographers.

Meanwhile, Jennifer's friends are reportedly concerned about her decision to patch up her relationship with John.

Her close pals - including 'Friends' co-star Courtney Cox and her husband David Arquette - believe John has no intention of pursuing a long-term relationship with the actress, and are worried he will end up hurting her again.

A source said: "Jennifer's friends are just worried that she will again be hurt by John. It's a shame she's attracted to a guy you know is not around for the long haul. John will have moved on to someone else by Christmas."

Jennifer and John first dated for around 12 weeks, before they split in September.