Using "me te se nos"
Im not sure if I am understanding the topic correctly. I often see people use "te quieres" and not just "quieres" why is the te necessary when it is already showing that it is the second person. Ex: "Te quieres casar conmigo?" why is it just not "Quieres casar conmigo?"
Is incorrect to say "¿Quieres casar conmigo?". It shall be "¿Quieres casarte conmigo?".
Notice how the "te" (meaning something about you or with you) is now before casar. You use the "te" to emphatise i want to marry you and no other one.
SpanishDict has great language guides. Here are the ones on pronouns: https://www.spanishdict.com/guide/category/pronouns
In "¿Te quieres casar conmigo?" the reflexive pronoun "te" actually goes with "casar". The questions is identical to "¿Quieres casarte conmigo?" Do you want to marry yourself to me? Do you want to get hitched? ;-)
That was a good question! I didn't realize that the "te" did not go with querer until I looked it up.
Spanish has "pronominal verbs", verbs that require a pronoun to work. They usually have a counterpart that is "transitive" (A acts over B) whereas the pronominal version is "intransitive" (A performs the action). In this case, "casar" means "to marry someone", like a priest or officer, and "casarse" means "to get married".
"Casé a una pareja ayer" (I married a couple yesterday) vs "Me casé ayer" (I got married yesterday).