Is it bad to be in a relationship with someone but you like someone else and you don’t feel happy or as if you don’t belong with your partner and you don’t know what to do….

it'll better to breakup the relationship and be with someone you really like.

Explanation:

cause that person now you're with can't make you happy and a good relationship goes with happiness too so better to find someone you're happy with instead of being with someone who can't make u happy

Hey there. The best advice I can offer to you is to go with your gut instinct. If you're no longer interested in someone, it is better to call off the relationship than to lead them on and keep them believing you're into them. If you no longer can feel that spark between you and someone, or you feel as if they're slowly becoming a stranger to you, I would end the relationship. Another thing too: If you are no longer happy and someone else does make you happy, end it and go with what your heart wants. I hope my advice helps. :)