Dear Penji,
Getting guidance on this would have a lot of angles to cover, it would perhaps be better to speak to someone in-person to obtain better understanding of your situation.
Based on the limited information provided, stop flirting all-together with the opposite gender, the end result will be sorrow and suffering, it's just a matter of time. Stopping the flirting falls hand-in-hand with self-control and self-discipline, there are many gateways to obtain some of this, but the most powerful and always accessible gateway is the Sri Guru Granth Sahib Ji. You can reply for more details if your interested, as I don't wish to force you into thinking in a way you don't realize or understand yourself from the inside.
In my humble opinion, unless your at an age where you're ready for marriage don't waste time with meaningless relations with the opposite gender. It uses up a lot of energy which can be spent discovering yourself through spirituality and life. You can only know the type of person you'll like if you understand yourself deeply to some degree. Some guys/girls leave each other because through that experience they discover something about themselves through the relation they had. The only harsh thing about this is it can leave someone's heart shattered, leading to depression, emotional attachment, feeling of hopelessness etc. The lucky ones get out of this stage with Guru's blessing, but some stay in it for very long time. If your not in this stage from your past-relation, then consider yourself lucky and thank Guru Ji for teaching you. Learn from the experience and move on, don't make the mistake again.
Don't worry about the thoughts of you'll never find someone, leave it to Guru Ji, you'd be surprised how many people say they'll never find someone, and out of no-where when Guru Ji sends the right person at the right time, you'll be over-joyed with love. Have faith in Guru Ji. :)
Try speaking to someone older of the same gender, they an advise you best.
Hope this helps.
