I am on the waitlist and they want me to decide if I want to remain waitlisted or not. I want to remain waitlisted. However, I am afraid that if I accept wait list and I am admitted then I would HAVE to attend. Is this the case? If I accept waitlist and I am admitted am I required to attend? I am still considering my other options, but UCLA is still on my list.
No, you do not need to attend anywhere where you get accepted off the waitlist. You will have to deposit somewhere by May 1, and won’t hear from waitlist schools until later, so you do lose that deposit if you accept a spot off a waitlist. You can waitlist at as many schools as you want to, too. You usually get a very short period of time to decide if you get an offer from a waitlist, though, and that can be kind of high pressure.
No, the waitlist isn’t binding, so feel free to submit the SIR (Statement of Intent to Register) for another college before May 1st! Then when decisions for the waitlist decisions come out in late April/early May, if you’re accepted, you can cancel the SIR for your other college and send one in for UCLA. If you’re rejected or decide on another college, then you’re still able to go because you submitted the SIR. I’m in the same position as you, as I got waitlisted for Biomedical engineering at UCLA, and I’m going to choose to opt in! Good luck!
So are you saying that if I accept the waitlist(School Y) and I get admitted after I have deposited for another school (School X), I can lose my spot at School X even though I submitted my intent to enroll and I would have to attend School Y?
@hillaryly with reference to your post #3. No, you do not lose your spot at School X. That spot is secured with a deposit.
@hillaryly No, like @Oregon2016 said, you don’t automatically lose your spot at school X if you get accepted to another school (school Y) after your have submitted an enrollment deposit and SIR for school X. You can still go to school X if you’re accepted to school Y. If you do get in, you would just have to choose if you still want to go to school X. If you still want to go, you wouldn’t have to do anything. If you decide school Y is better, then you cancel your SIR for school X and send one in for school Y.
Sorry if I keep repeating myself, this is all new to me. Do you know if I accept the waitlist offer now, as in the second to last week of march, and in the event that I am accepted, I can still submit my intent to enroll for another university the LAST WEEK of APRIL? Also are you SURE SURE that if I accept the waitlist and i get admitted I won’t HAVE to go there?
@hillaryly Yes, if you opt in for the waitlist now, then you can still submit a SIR for another school at any time. And yes, the waitlist is not binding, so even if you do get accepted through the waitlist, you are not obligated to go.
YES. That is the way waitlists work at every major college in the country. You can accept a spot on one or more waitlists, and still deposit at another school that has accepted you (that way your are SURE you have a college to attend in the fall). If you get an offer for admission off a waitlist (usually they come in last May, maybe June), then you have a short period of time to decide whether to accept the waitlist school’s offer. If you accept it, you need to notify the first school where you deposited that you won’t be attending. You likely will lose your enrollment deposit at that first school (some schools have a separate housing deposit, and whether you get that back varied by school). But you have that spot at the first school until you decide FOR SURE about an admission offer from a school where you waitlisted. If you decide not to attend the waitlist school after receiving an offer from them, then you just go to the school where you made your initial deposit (or some other school that offers you a spot off the waitlist if you are so lucky).
Colleges are used to this. They know that everyone has to accept a spot by May 1. It is like a game of musical chairs, and no one wants to get caught without a seat. But they also know that if students are offered admission off the waitlist at another school, that you will likely leave them and take the new offer. They might then make an offer to someone else from their waitlist to fill your spot. 
But it is in your control. Until you notify the school you deposited at prior to May 1 that you have accepted an offer elsewhere (off a waitlist), you are solid at the school where you initially deposited.
Maybe your confusion is that you have heard about double depositing. You CAN’T tell two schools prior to May 1 that you are attending both of them and send two deposits, just to give yourself more time to think about it. That is against the rules. But all schools have waitlists, and the system is set up to allow you to deposit someplace by May 1, but accept a “better” offer later if you get one.