Q1.I like this native guy and there's a lightning bolt next to hie pictures under the relationship tab and when I click on him,there's more lightning bolts on stuff an it changes.What's up with that?and i want to have a heart beside him ratherthan a face but i cant get over 59 like points.

Just keep getting them to talk and play etc. Try playing chess together, once the relationship score is high enough then try flirt.

i already do all thAT.the only thing i cant do is kissising him. and what does the lightning bolt mean?i know it means chemistry but what does chemistry mean(not the science and chemical potions chemistry)?

It means they have similar likes and dislikes, you know how you chose 2 things they like and 1 they dont? for example if they like black hair and your sim has black hair its one chemistry bolt.

As for kissing you have to build up their relationship really high first, and also most of the villagers wont kiss you until after the date and completing other goals.