10 points for the best --Please help me interpret my ex's writing. English is my second language. Thank you

the first line suggests that he is thinking about why people can not stay true to their relationships and work on it instead of going out and finding pleasure in others he is saying that although some people blame this on their cultures it is not how he wants a relationship to be, when he says some operate outside the cultural conventions it can cause a lot of emotional distress, he means that he is hurting. Did one of you have an affair? he thinks it is more important to be with someone long term and love only them than to just seek someone for instant gratification. when he says about the relationship from the young to their elders he is saying that there is respect for the older generation and maybe he did not feel you respected him, maybe he was older than you and felt you needed to show him more respect than you did, where he said "many conventions of personal relationships an be broken but still remain with in the boundaries of morality, there are many that these agreements can't be broken with us not considering them wrong" he is explaining that he valued your relationship and some things are exceptable but what ever happened he saw this act as unforgivable and disrespectful, he feels you broke your promise to him, he seems like an old fashioned guy who beleives in building a long lasting and loving relationship he does not beleive that a person should stray or seek instant gratification, the is saying that you broke your promise to him and if you were married to him and had an affair the only solution for him is to let you go and divorce you, this guy is hurting and although he has not put it in a way for you to understand he is warning other people to respect their relationships and stay true to each other, he valued your relationship and considered it a promise to stay faithful to each other this seems to have been broken so he is saying if you love and respect someone you should resist the instant pleasures in life that do not really mean any thing to you and to value the relationships you have before you lose them. don't get caught in a cycle of finding someone and thinking you care then moving on to the next before you are finished with the first, honey the best thing you can do is move on with your life he is saying don't make the same mistake as before,