
RP can get to people. It can get to a lot of people. You become VERY attached to your character, especially if they have a lot of you in them (Which new RPers tend to do as a jumping off point). I've been RPing for 15 years, I cry when something sad happens or get happy when something good happens - you get attached. That's okay.
However, there are some kinds of RP some people can never do because they step over the line of OOC attachment. It's always helpful to figure out exactly what kind of RP sets you off. For instance (Not saying you do any of these, of course, these are just examples
~ Overly Dramatic Plots. Could be too sad or too upsetting, generally.
~ Romance RP: the EASIEST to get too attached too. I actually recommend new RPers don't romance RP until they get the basics down.
~ Triggering Storylines (Murder, Rape, Torture, etc): This one is pretty obvious.
I RPed with someone my first six months in the game who RPed with us for everything except when the plot turned "dark" (She decided when that was) and would come back when it was resolved. She told us she just really couldn't handle the darker plotlines in RP and we respected that. She's quit the game now, but we never had an issue with her. I also know plenty of people in my guild who are a solid, firm no on Romance RP.
RP is supposed to be fun, if something is triggering negative emotions, you are allowed to say "I can't really be involved with that, sorry" and take a step back till the story is concluded. If people try to push you into it any way or try to convince you it will be fine - they are being completely jerky about it and you don't have to rp with them.
All of this is kind of me babbling. There are steps you can take, but you feel like your in too deep now so taking a bit of a break is probably for the best. If you feel like your addicted to the game, that's a whole other issue that can really only be resolved by not playing or - if you can do it - playing only 1 or 2 hours a day. Taking a step back and figuring out what was and wasn't fun then staying on the "This is fun" side is very important. And if nothing hits the "This is fun" side then stop doing it all together
Edit: From the above statement it sounds like you think RP is fun? Or you think your obligated to do it because you're a popular character/your friends do it?
However, there are some kinds of RP some people can never do because they step over the line of OOC attachment. It's always helpful to figure out exactly what kind of RP sets you off. For instance (Not saying you do any of these, of course, these are just examples

~ Overly Dramatic Plots. Could be too sad or too upsetting, generally.
~ Romance RP: the EASIEST to get too attached too. I actually recommend new RPers don't romance RP until they get the basics down.
~ Triggering Storylines (Murder, Rape, Torture, etc): This one is pretty obvious.
I RPed with someone my first six months in the game who RPed with us for everything except when the plot turned "dark" (She decided when that was) and would come back when it was resolved. She told us she just really couldn't handle the darker plotlines in RP and we respected that. She's quit the game now, but we never had an issue with her. I also know plenty of people in my guild who are a solid, firm no on Romance RP.
RP is supposed to be fun, if something is triggering negative emotions, you are allowed to say "I can't really be involved with that, sorry" and take a step back till the story is concluded. If people try to push you into it any way or try to convince you it will be fine - they are being completely jerky about it and you don't have to rp with them.
All of this is kind of me babbling. There are steps you can take, but you feel like your in too deep now so taking a bit of a break is probably for the best. If you feel like your addicted to the game, that's a whole other issue that can really only be resolved by not playing or - if you can do it - playing only 1 or 2 hours a day. Taking a step back and figuring out what was and wasn't fun then staying on the "This is fun" side is very important. And if nothing hits the "This is fun" side then stop doing it all together

Edit: From the above statement it sounds like you think RP is fun? Or you think your obligated to do it because you're a popular character/your friends do it?