what exactly does "my heart aches for you" mean?

[LeTyan]

I guess you can use it for the second meaning too, as long as the context shows it's not romantic. You should begin every sentence with a capital letter, otherwise teachers will be annoyed and won't answer you.

Thanks for reminding me of that. I will try my best to make whatever I write grammatically correct.

[LeTyan]

Suggestion:
Considering you have come across the expression my heart goes out to you, which means empathise with someone, why don't you use it in your second example? It may be clearer and you'd avoid any romantic connotations.
Hope it helps.

Thanks for your suggestion. However I don't want to avoid romantic connotations(maybe my words before were being confusing? sorry), I actually want to stress that.

[LeTyan]

I actually seem to have a new idea about trying to make it sound romantic(at least to me). How about "If it breaks your heart, it breaks my heart too/as well"?

Does it sound romantic to native speakers?(If not, that's fine)

[Raymott]

I actually seem to have a new idea about trying to make it sound romantic(at least to me). How about "If it breaks your heart, it breaks my heart too/as well"?

Does it sound romantic to native speakers?(If not, that's fine)

To me it sounds cheesy and fake. But I'm not the person you intend to address. Whatever you choose to say, the important thing is how the hearer will interpret it. And do you really feel that way?

[LeTyan]

To me it sounds cheesy and fake. But I'm not the person you intend to address. Whatever you choose to say, the important thing is how the hearer will interpret it. And do you really feel that way?

Yeah I think you are right! It really depends on the person I wanna say this to. For most of the guys, very likely it would sound cheesy and would even make them throw up all over the place. But I honestly don't know how girls at different ages would interpret this.

[Raymott]

Yeah I think you are right! It really depends on the person I wanna say this to. For most of the guys, very likely it would sound cheesy and would even make them throw up all over the place. But I honestly don't know how girls at different ages would interpret this.

OK, if she's 13 she might like it. But you're on your own when it comes to accepting the consequences!