Issue adding friends

have you downloaded origin to your computer? from there you can add or delete people from your friends list, & in the situation you are in, which i just figured out cause i was having the exact same issue, i logged onto the origin program on my laptop & got the message saying that either they already had too many friends &/or requests (that have not yet been addressed), so it'll tell you that you can find them, but you cannot add them at this time. so i went to those few people in my origin friends list & all of them said that they had reached their limit, which is why it is not working, so i deleted them from my "waiting" list to open up a few more spots for new friends. 100 is the set limit for friends, & that also accounts for any pending requests that person has "in limbo", so it may say they only have 80 friends, but that means that they have 20 requests that they either haven't or can't accept, & they must either accept them, or clear them out if they cannot be accepted. i hope this makes sense & helps, as i know for a fact that it works...!