Thank you very much

If I romance Vette at the end of Chapter 3, can I switch over to a different companion romance by the end of Ossus, or am I forced to continue the romance I chose at the end of Chapter 3?

Playing as Jedi Guardian in Sith story and I was wondering if I can have my character do the Juggernaut stance where they hold the saber with one hand rather than two like in guardian. Is there a way to do that or is that stance tied to the Juggernaut?

Is there still a point to maxing out LS or DS points to rank 5? I was told you needed those levels to unlock the combat styles for Empire classes in Republic stories and vice versa. However, my legacy just unlocked those for me so is there any point in achieving LS and DS 5?

Do I need to stay DS Alignment in order for her to be romanceable, advance DS alignment to progress into marriage, OR can I go back to LS Alignment now that I have DS Jaesa as my companion and can she be romanceable all the way up to marriage even though the player is LS aligned?

I have 1800 LS and 1500 DS on my Sith Warrior and I have Light Alignment one on him. I was told that you just need 1000 DS points to have Dark 1 alignment in order to make Jaesa go to the Dark Side. Well I have over 1000 DS points, but I'm also Light aligned. Will I be able to convert Jaesa to the Dark Side since I have at least 1000 DS points, or do I need to convert myself to Dark 1 aligment before meeting and converting her?