Lol, seems like he is cheating on you .. anyways here is the translation. Good luck
Man : mathak wenawa oyawa
(You are always in my mind)
Girl : me too
skype?
Man : I can't raththaran
(I can not do it love)
I thing monada visthara
(So, what is going on)
Hama dekakma hodin neda
(All is well , right ?)
Girl : ow dear
(Yes Dear)
oya ??
(How about you?)
Man : Okkoma hodin
(All good in here)