Wtf-is-that's Things

I know this is wrong, but I couldn't help it cause her alarm so annoying. So I was looking for alarm settings in her phone and what I got is her diary. And it just one sentence 'I hate myself' and she barely turn 13 next month. I feel so horrible right now consider me and her are very close. I know she has this tendency cause she drop out at 3th grade and she barely has no friend. I can't tell her diary to my parents cause you know, parents. Is my sister just in her phase right now? Is she need help? But I will turn really annoying if 'out of nowhere' I ask about her personal feeling cause she really hate that stuff... What should I do? Act like nothing happens?

Is it weird if I am straight when it comes to sex but pan when it comes actually love? I don't care what gender when it comes to dating but if having sex I just want to dick... And I don't even like sex that much. say if I'm your lover, and you don't have a d, and I say, 'hey you don't have a d, can we just love each other without having sex?' are you still with me or 'nah, you dick lover bitch. Just go and find your d' or you have another answer?

And if you have same case as me, are you fine if your partner go around fuck with someone else cause you can not pleases them? I think is fine as long they love me right? Or I just being dumb?

Feel free to roast me if you find this question weird af lolololol.