as long as ... is okayThe pattern Xさえよければ means “as long as X is okay” or “if X alone is satisfactory.” さえ emphasizes that this is the only condition being considered.
JA: あなたさえよければ、週末に一緒に映画を見に行きたいです。
EN: If you're okay with it, I'd like to go see a movie together this weekend.