How can i get rid of this?

i don't know if i'm bipolar or if i have ridiculous mood swings. but one day, i love life. i don't mean to brag, but i have a job, a car, an amazing family, it's all good. but then (i kid you not) the next day, i would do anything to kill myself. there's rarely anything bad going on in my life but i tend to point out little bad things which annoy everyone and i hate annoying people. the only thing that can make me truly happy is family and we only have time to get together only during the holidays. and i can't be with a guy for more than 3 months without getting bored (maybe it's just the guy) and now i'm scared i won't last long at my new job...

also i've been losing interests in passions i used to have....but then slowly i regain those passions, then i lose interest again.....

how can i make myself more happy with less or no mood swings? EVERYBODY notices it and i just wanna be100% happy with pure passion for photography (the one i'm going on and off about)

i just turned 18 and i'm not taking any type of drugs at all (and when i say any, i mean ANY)

How do I say this, if you think something is wrong and is interfering with your life then it is. You know yourself best. I would get medical attention immediately. Mental illness can be devastating just like cancer if left untreated. Maybe an organic dysfunction is occurring. Don't let it go. Answers is not the place to find an answer to a medical problem. I'm not a medical professional, just a fellow being. You need to be happy and anything that detracts progressively from this is an important issue. Please seek guidance.:-)...

most possibly NOT bipolar, as anything from drugs to medicine to depression can cause mood swings. For the depression and the lost of interest and mood swings, it might be a drug (both medical and illicit) you are taking.
and as for the getting bored with a guy, that is probably a effect of trauma in your early life, like a loved one leaving you. good luck

could be but u r young and when we r young we get mixed emotions so dont worry just yet

Since you suggested bipolar than go to your Dr. & explain all your symptoms to him/her. I dont think it is Bipolar just a little confused about what you want in life. Is it possible you are not trusting your own judgement when you make descisions in your life. Stop 2nd guessing yourself & relax & enjoy life. You can also try moveing closer to where your family lives.

You remind me of someone...oh yes, a woman.