So i was seeing a 26 year old and she understood me very well and accepted me for who i am then out of the blue she texts me saying that now shes seeing someone else and it 'just happened' i thought i was a good guy but i guess im not good enough

OP, take it positively instead of being negative to yourself. She doesn't meant for you and you'll find someone else better.

Its hard for me to take it positive because it makes me feel like i did something wrong

Ask yourself : did you do something wrong to her or did you gave your best shot? If the answer is the latter then stop beating yourself.

@ssskippy it doesnt mean u did anything wrong honey, it jus means she found someone else she likes to talk to, and who knows she may tell him the same thing 2 weeks down the road. jus be glad u found out now, find someone that wont be looking for someone else while talking to u, thats when u know its real. someone is worthy of ur attention, jus be patient and dont give up. good luck to ya

Thanks. And usually i dont do anything wrong but i still treated like this.

OP, if you don't do anything wrong then the lady is not meant for you though normal reaction is to blame oneself. As you get older & mature, you'll understand more the complicated meaning of relationship wherein it only works if couple have MUTUAL commitment and genuine love.

Good luck sweety