My girlfriend doesn't want to have sex at all
We first met six months ago,and everything were OK.then after a month she left for five months to study at another country.I went to visit her after she being there for 3 months,we were together for 10 days,we were sleeping together,having bath together but she would not have sex with me.I asked her many times if she had another relationship or health problems or if somebody hurt her and the answer to every question was no.she said that she wants to be with me and doesn't want to break up,and that she did not know why this was happening.I just waited for her to come back not so stressed and now she is back,we are together,we are sleeping together but still no sex.she keeps saying that she just needs time but two days ago she said that nothing is able to turn her on.she is in a kind of a depression,always sad and nervous.I asked her if she wanted to visit a speciallist with me and she reacted very bad to the suggestion.I love her and want to be with her but I just know what to do.she won't discuss the matter anymore so I don't talk to her about it.she is 22 and I am 27.thank you for any help