i would prefer to choose with brain & because of that i think my relations with him / her ( healthy )will maintain till death. i would prefer to be good friend & i would like to take care from bottom of my heart & she doesn't feel guilty or embarrassing because of me.

Love is an illusion...

If you desire a stable answer, then you can get it only from your heart and never from your brain or mind. Logic is like a double sided sword. With logical thinking you can prove that “god is” and also with logic you can also prove that “god is not”. Human mind is highly unstable...always in state of flux…continuously changing, never the same for two consecutive moments, each moment it is different. With the mind one moment you are happy, another moment you are unhappy. Mind goes on moving ‘ So if you have to choose a way, simply follow your heart. Now coming to your question –“You love someone very much, but you don't trust this love.” There exists no love in this situation, because true love is unconditional and is based on absolute trust. Also possessiveness is not love. A person particularly you love has to remain intact as an individual. If you really love him / her you will love the person’s freedom too, and he/she will love your freedom too. If you love a person, how can you destroy his or her freedom ? If you trust a person you trust his / her freedom too. Trust cannot be betrayed. By it’s very nature, by it’s very definition, trust can not be betrayed. It is impossible to betray trust. If trust can be betrayed it is not trust. Think over it. Also love is a process which if starts never stops or ceases. It keeps on growing and has to keep on growing. When love does not grow it becomes something else. Love is a strong energy, yet it is very delicate. If it does not grow, from being sweet it starts becoming bitter, it starts becoming poisoned – It becomes hatred and it can even fall below hatred – it can become indifference, which is farthest from love. If love grows you will find it no longer remains love. It becomes meditation, it becomes prayer. If you tend love carefully it becomes prayer. It becomes, finally the ultimate experience of God.

I think in this situation is better to choose by brain

the answer is in your heart.you should decide by yourself.i prefer use my heart not brain.as brain isn't clearer in love.so.......