Would you get jealous if your boyfriend hug other girl?

I just found the pictures of him hugging other girl in his hardrive a few days ago. He left me his hardrive & his belongings before he left for his work and hes at other country right now. In the picture, He hug the girl around her shoulder and the other picture is my boyfriend siting at a certain height the girl standing on the ground inbetween my boyfriend leg and with his arm around her neck. And they look very happy in the pictures. When he's with me, i seldom see him smile although i treat him good. I am really flare up and It makes me feel disrespected. I cant contact him through phone call I thinking to confront him through email. We planing to get marry but i feel he's been disrespectful after i saw this pictures and am rethink should i marry to this guy or not? i chose to forgive him in the past if he did anytime wrong. He hurts me more after i see the pictures. I got nobody to talk to about this issue. I cry alot for the past few days because i dont know whelther to stay with this guy or not? My concern is will he be like this after we got marry? i am really upset. Should i dump this guy through mail instead? Would someone help and give me advice on this?