I think we can attain moksha while living an ordinary life. Renunciation of our ordinary life may be helpful but I do not believe it is necessary.

If by fascination you mean a sense of awe at the universe, then I think that is fine.

I know it is difficult if other people may take advantage of you. I think we have to be skilful in our actions. We can have the wish that everybody is happy (that is love) but we have to be careful how we express that. People may try and take advantage, which isn't good for them or us. One example is giving an alcoholic money that you know they well spend on alcohol. That would only end up hurting him. It is hard, but with wisdom we eventually become skilful enough to know the right way to act always.