Shall I have faith in my boyfriend or be wary?

I was in a long distance relationship for two years and my boyfriend cheated on me during that time. For the next two years he moved to my Country to work things out between us and that's when he confessed. It was a struggle but we managed to work things out as he spent the next two years convincing me and working hard to gain my trust. About 4 months back due to some family emergency he had to move away again and we are again in a long distance. He still calls me 5-6 times daily and we are waiting for him to settle in his work before we are married. However recently, i have seen a lot of his photos on face book with women, not making out but hugging them in an intimate manner even though he said they were just kidding around and when I went to visit him and his family he made me meet all his friends including these girls. He also told me that he was planning to take a trip with a female friend to a different country over the weekend since he has a free weekend and he has never been there before and he ured me that its a harmless thing and that they would have separate rooms however when i objected he said that he would not go if it would make me feel better but i could tell he really wants to go so i told him that i was ok with it. When i reacted badly to his photos and again commented that i am not ok with the trip he called me a prude and told me to think about what I was saying since he has been trying to gain my trust ever since the incident. Also, I had taken a trip with two of my guy friends and he was ok with that. I really don't know how to deal with this or if its actually harmless as he says? Please help!