What does this mean in English 'Te quiero tanto y yo siempre quiero estar con usted'?

It means "I love you so much and I always want to be with you". There are a couple of grammatical issues with the sentence, though. First, the "yo" is really unneccesary, since the conjugated form "quiero" can only be used in the first person. Another issue is the use of "usted" at the end. Since the sentence begins with "te", it is clear that a familiar person is being addressed. Instead of "con usted", "contigo" should be used.