“Swallow it. “
You ARE a guy, right? Nobody just “swallows” it. If there is real attachment, it is painful and hurtful, trying to get over a broken relationship. This is like telling someone suffering from a broken leg, “STAND UP, ALREADY!” Life is not like that.
The thing of it is, the loss of a close relationship is like a death, in terms of the emotional and visceral reactions a person might have. Both, need to be grieved. The problem is when the grieving is overly long or disproportionately negatively affecting the person grieving. If they cannot eat or sleep, then professional help may be required. Ditto, if one becomes obsessive.