Am i just a puppet for a biological machine?

I care a lot about love and existentialism. When I think about dating and falling in love, even though it's important to me and I want someone I can talk about these things with, I always take a turn and end up thinking it's pointless and that it's all based on superficial things like surviving and attraction. Does love descend upon these things at all? Can you reach a point where these things are no longer required or is it all just hormones in the brain? Will we still be lonely ?

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And then.. Are all my dreams and desires just a product of the experiences I've had or pre-wiring in me? Is there any independence in my actions or my interests? When i think of being unique, it just bothers me that we haven't chosen anything about ourselves or even our preferences for our partner, however we have made choices that led to this point, but in a broader perspective, it was already predetermined (except from a quantum physics point of view where many things are possible and the future is not set in stone)

Then, what do I do with this imperfect world ? Do i try to fix things and how? Like global poverty and social chaos, am I a bad person if I dont?