-----"...people at work have already labelled me as being mentally ill."
Do not let your mental history define you. It's what's you do from this moment forward that matters. You don't have to be MrSocialGuyOfTheYear. These people are your *coworkers*, not your friends -- you are there to earn a living. Just focus on being competent at your job and what you will be spending your paycheck on. Eventually, those people will forget your mental moments and may actually grow to admire your tenacity despite your obstacles.
-----"I realise that I have delusions cause I wanna be more than I am and escape to fantasies."
You are *you*, and that in itself is special. Just be the most pleasant person you can be, and no one else will justifiably have anything bad to say about you.
-----"I need advice on how to control my delusions as they seem logically possible."
When things in life aren't going our way, what's wrong with a bit of escape? The key is to know the difference between reality and fantasy, which you appear capable of doing.
I sometimes fantasize about winning the lottery and making every person who has ever upset me pea green with envy. I actually go to websites every weekend and pick out the dream home I will purchase, once I get my hands on that money. I sometimes check out houses in completely different states. (I'm really getting tired of the high temps here, so I assume that's where *that* little fantasy came from.)
Early on, my voices told me they were going to give me 300 million dollars. Of course, I've since learned my voices are pretty much full of crap, but I still hang on to that *fantasy*. The key is to realize it's *fantasy*... Mere voices aren't going to jump out of my head and write a check for 300 million dollars.
Are my fantasies hurting anyone? No. As long as I realize it is a mere fantasy and the odds of winning the lottery are slim, I'm not hurting myself either.
I also read a lot of fictional novels to escape. What are fictional books if not fantasy?? For that one moment, we are transported in time and place into a world in which we do not actually live.
Do you read books? If not, I highly recommend them. How about putting your fantasy to paper? Sounds to me like you'd be able to write a pretty entertaining book.