Just a little translation

    Please help with some translation below.

1.  I have not seen you lately.

2. I have not seen you for quite sometime.

3. How's thing with you , everything ok ?  ( for this phrase any french equivalent should do )

4. Have you been busy ?

        The above phrases may seem simple but if I try to translate them into french I probably make mistakes and they wouldn't sound right. That's the problem, so please help. Merci en avance.