If there was a guy/girl who you like and would want to be his/her s but she/he doesn't t have the same feelings but really wants to have a normal friendship, would you ignore your feelings that it d hurt every time you d hang out with him/her because you d know how it could be and how it isn't t going to be or would you just end it?

Being friends is great if you can handle it, but when you know you cannot, then it's best to step back until you can, rather than just force it, so just hanging out with some one you have strong feelings for and they do not, is not a good idea. The good news is you don't have to make a big drama out of your rejection, just do your own thing, and hangout with others, and you may find that the cooling off period allows you to MAYBE handle a friendship better with an ex crush. It may be a bit awkward for a while, but we can get over that too, and learn to deal with it gracefully.

Easier said than done and a challenge for sure, but that's how we learn to handle ourselves because you will experience these situations all your life.

It is up to you, normally if one or both parties have more than friends in mind, and it does not work, often the friendship can not continue as close as it was

You are in complete control of how you deal with this. If you let it ruin you, it will. If you don't let it ruin you, it won't. Personally speaking, I don't allow anyone to have that kind of control over my life. So he or she is not into you - move on. It probably isn't the first and it probably won't be the last. But that's okay.