How can I stop thinking about him/her? Why my heart hurts so much?

It can be hard to get your mind off of someone, but from my personal experience the best thing to do is to either a) distract yourself by doing activities you love or b) track your feeling every day using a journal and how you feel each time you engage with the person. It helps and you'll eventually be fine i promise :)

See your friends, remove social media evidence of them, talk to someone on 7cups, take care of yourself. You can not switch of thinking about someone, it will take time but you will get there! Heartbreak is an awful awful thing but you will be okay before you know it, even if you don't believe it now.

It's alright. Heart hurts because it loved once. And it's okay . Its okay to not feel okay during such times. Start distracting yourself in doing activities you love doing and make sure you socialize more and more, that would help you to move on to a certain extend. and then time would play its role. :)

Sleep. Occupy mind with something,. Exercise till u drop. Go into an enclosed place or open space and scream.

Yeah its absolutely natural to being in love someone , or like someone . its never be in your hand to love someone. Love is somewhat like unconditionally ,its donot see religion colour caste or anything its a basic connection by heart only . but its not necessary that u can get someone to whom u love or might be possible that she \ he would torn your feelings as well . but that's doesnt mean love is bad or never do again . love is the most precious things of the world who holds u tightly . if someone doesn't accept your love dont worry be optimistic about that the next person actually never deserve your love and feelings . I know its very painful to forget and move on but believe me the soon u get of out it the more u see yourself better and can Buck up yourself as well by confidence what u gain after this, that life doesn't ends here if next person has refused your love . u must keep strive for better love partner and believe in that somebody is there who made for you , who deserves u actually . who holds your hands unconditionally and that confidence will payback u definitely in future 😊

I don't think I could stop thinking about the people I love or have loved, because Love is a strong emotion we identify with as humans and I think its the essence of life, so if someone ever was loved by me, I doubt I could just forget them and not hurt because naturally we would want to be with people we love and to be wanted by them, and not having that happen is a tragic place to be in. And understandably we would then be consumed by their thoughts and their absence. I think with a good structure in life and time to build on a different future and a better future with hope for love to find its way back in our life might be how we can not be consumed by this loss, and that structure or acceptance can be different for everyone which will help them heal and cope.

Finding a new hobby to take your mind off a breakup is always a possibility. Talking to someone about it can help just as much.

You are probably very attracted to said person, I have experienced a similar feeling, the best way to move on is carefully and at your own pace

You can find an activity that you enjoy. Something to escape and keep your mind off things. A safe place.

You can stop thinking about that person if you find a new hobby to work for. Its natural to make your heart hurt because we are human afterall :)