It's all upon you. You can find some insights on the wiki or discord. ;)
Viewing post in Love & Sex : Second Base comments
thanks bro, but I still have my doubt I saw the new wiki and it does not say anything about increasing the LP of Lex to 80, whenever I try to propose to him he always rejects me I do not know if I have to do a specific action or do another activity (in the missions section does not tell me anything)