1 I have been loving you so much. I have been in love with you so much. - They both sound a bit odd, If you are using so much to express time you could say " I have been in love with you for a long time" 2 I quit the club. I am quitting the club. They are both grammatically correct just different tenses " I quit the club" means that the action (quitting) has already been done "I am quitting the club" means the speaker intends to quit but has not yet done so 3 Let’s go to his home. Let’s go to his house. Both make sense in English, however the term home sounds more polite. Either would work :)