i want to get pregnant?!

I have PCOS and was able to conceive naturally within around a year of not using contraception. However, PCOS is worse in some people than others.
Since you have been trying for 3/4 years, I do recommend you now visit your GP and talk to him about fertility treatments, obviously it's something you and your partner will need to discuss, as there are expenses involved.

I would also recommend speaking to your GP about anything else that could be making your PCOS worse - being overweight and a poor diet is a major cause to a lack of periods. I usually had 2 or 3 a year, when I lost weight and ate healthily, within a year and a half (when I got down to a normal, healthy weight) I was menstruating every month and the PCOS had little impact on me.

As others have suggested, you can also look into adoption.

Eat food high in protein, and only have sex when your having your period.

Adopt a baby or
Keep trying and wish for hopes to come

Well why don't you adopt a baby?
or
Have sex with your loveones?

you should go to doctor immediately.