Not feel excited anymore. By docs.

I am a virgin.Previously, like a normal person, i had some physical needs but now i don't want to be with anyone.Although I have a boyfriend since 4 years.But we are in a long distance relationship.We have not met, in person, from past 2 years as he is in another country.We only talk over phone or do video calls.Earlier i felt excited while talking to him, physically too,but now i don't feel this excitement..don't feel anything.Sometimes i even get irritated when he talks about being physical.I don't know what to do.Why am i losing interest?I mean this is supposed to be the peak time as told by my friends.I tried to discuss this thing with him too but he got mad at me..really bad..now i am scared to even mention this thing again.I was under depression & really stressed over some issues for like 1 year & so..took many meds as suggested by docs..but from past 1 year, i am not on any prescription & i am doing okay..not great but fine.I'm facing this issue since 2 months. Pls help.