I was like this all my life and actually felt shaky if I was presented with food to try that I didn't know the flavour of. I irrationally hated foods just based on sight and was scared of anything that wasn't what I'd grown up eating (plain staples like pasta, rice, potato, bread, fruit and veg). I was even scared of eating fish fingers or sausages that had more than like 3% pork in them lol). As all the foods I ate were plain I sought out flavour in sugary foods and would drink ****e loads of fizzy drinks and got obsessed with pastry/chocolate as they were the only excitement in my diet. Late last year I said 6 weeks without any sugar (bar natural sugar in yog/fruit) and it was the bloody hardest thing I've done but also the absolute best as it forced me to seek the exciting flavours I craved. I gradually lost my fear of trying things and now you can't stop me seeking out new flavours, types of fish, trying recipes etc. It's improved my quality of life sooooo much as I can eat more socially and without saying 'do you have chips' at every restaurant. It'll happen for you! If someone had told me I'd be like this just a year ago I'd have laughed in their face but put your mind to it and you can beat the fear.
Good luck x