Learn English – Different ways to say “even if”

These two are not equivalent. Even though is used to introduce a condition which currently is true, while even if introduces a hypothetical condition that is not yet true.

I'm going to the park even though it's raining.

This means that it's raining right now, but I'm going to the park anyway.

I'm going to the park even if it's raining.

This means that it's not yet raining, but I will go to the park even if it starts to rain. Note that in this case the present progressive I'm going actually indicates a near future action.

Both are rather awkward and strange-sounding. Probably the most common way to end a relationship, at least in America, would be to say: "We need to talk ..."