unless there is more to his text, at no point does he REQUEST contact....he simply admitted he was wrong and asked that some day maybe you forgive him.
while perhaps abbreviated, it is an amends offering....there is no right or wrong way to do an amends...no formal script or pre-printed form. considering it was a text there was also a character limit to consider.
you are not AT ALL obligated to respond. you can however appreciate the effort, if you wish. many people here would be overjoyed to get an apology or an amends, half-assed or not. many people here feel that without it there can be no closure. say a prayer, wish him well in your head and heart and then be done.