亲爱的，我爱你 or 亲爱的，你爱我吗？

亲爱的我爱你吗，means dear ，do I love u ? it's not a affirmative sentence. 亲爱的我爱你，means hey dear i love u， it‘s a affirmative sentence 亲爱的我爱你嘛，if u read in a bullish tone ，bullish pronunciation， means u r asking if she loves u . if u read in a falling tone ， means honey i love u .

I think you should write""亲爱的我爱你嘛。" It show your love to your lover in a sweet way. If you write as ""亲爱的我爱你吗" that is a question for yourself: Do I love you?

It says more than it seems to, if it's a question. Just more interesting :)

I think both are correct . and both are Affirmative sentences.