Most Helpful Guy
There is no fixed timeline of breakup recovery. It varies from person to person and one's circumstances to another. If you dated a person you didn't really love, you'd be thankful for the breakup.
Dating a person you thought you didn't love can surprisingly be hurtful and prolonged the recovery period to weeks or months.
Also, if he lived with his for say more than a year, such that they were bonded socially and economically and in addition if he loved her so much, the recovery period can span months or even years.
People handle breakups differently. Some get, understandably, soaked in the past or hope the lover would return. If he falls in this category, the recovery period can be longer, say months or years.
His recovery can span years if he carries a mental image of the ex girlfriend such that she becomes the filter or mirror of the next girl he is looking for.