Colin Farrell feels ''lonely'' sometimes.

The Hollywood star has been single for the last five years and has revealed he occasionally finds himself feeling isolated - but is ''OK'' with his personal situation.

Colin - who his two sons, 11-year-old James, and five-year-old Henry, from two previous relationships - said: ''It's not that I don't get lonely sometimes, but I'm OK about it.

''The most significant aspect of my life lives far away from anywhere that a camera is needed. You play the part and do interviews but don't overextend yourself or put on a mask or change your name.

''When you get home, the only thing that matters is your son is not eating his turkey sandwiches and he's not into avocado anymore, so you have to find something new that he'll eat for lunch.''

Meanwhile, the 39-year-old hunk revealed he adopted a rather unusual approach to quitting cigarettes.

He told the new issue of Men's Health magazine: ''I wrote a break-up letter to the Spirit of Tobacco.

''I got a frying pan and tossed the letter with a load of tobacco, put some paraffin over it, and lit a match that sent a big, wallowing cloud up into the sky. Then I didn't have a cigarette for another two years.''