Whats up with my coworkers?

i am female, i work with a bunch of guys, alot of people, so a lot of personalities. anyway lately one employee that used to be nice to me started acting like it physically hurt them just to say hi to me. i tried to say hi, just to see what would happened, and they acted annoyed. he did this for a few days, and now they are acting somewhat decent, but i didnt do anything to this person, so i dont know what the problem is. i also stopped talking to a different coworker, becuase they were always moody with me although i was nice to them, they didnt want to help me but would help someone else, i finally got tired of the one day being nice and one day being indifferent. so ijust dont bother with them. another ione i stopped talking too, becuase they are gossipy and tried to involve me in their sneaky plans without my realizing, and it was involving their dissatisfaction with my former manager, and i didnt appreciate that, because i have no problem with that manager, and do not want them to think i gossip about them.a different coworker, who used to be nice to me has also stopped talking to me but i dont know why. they wont say if i did something, and i know i did not intentionally do anything, and they tried to act annoyed with me too. we have just gotten a different manager so i dont know if that has anything to do with it. i dont think the manager's bad tho. i want to ask what the problem is but if these people are just being jerks, i dont want to ask what's wrong becuase then they will just use it to keep drama going, and i dont think i will get an honest answer. should i just cuss them out at the next opportunity? its fine if they dont like me, but they cannot behave rudely to me, especially when they havent said what the problem is. what do you think? thanks in advance for your answers.