If you enjoyed About A Boy, try Music + Lyrics
Another "sleeper" that never seemed to make the big time like Bridget Jones and Notting Hill, Music & Lyrics is another Hugh Grant classic in my opinion. Completely different story altogether, yet there are very good parallels with "Will" in AAB.
Very similar gentle but genuinely funny humour, and also very similar in sentiment.
Been out a while so no doubt in the bargain bucket range on line, check it out and see what you think, but if you liked this I think you'd love M&L.