Should I give my boyfriend of 2 years a hall pass? Please help?

My boyfriend and I have been together for 2 years. We're very much in love, we live together, and we're planning on getting married when we graduate from college. We're only 20 years old though, we lost our virginities to each other and we're each other's first serious relationship. A couple months ago I noticed my boyfriend seemed pretty aggitated. I came to learn that he was feeling like he was missing out on "the college experience". All of his friends were going out, getting drunk, and banging random girls and he was feeling like he was missing out on all of that. We talked about it and he was distraught. He was so scared of ruining our relationship but he really wanted those experiences. I told him I'd give him a hall pass and he accepted, however, right before he was supposed to use it he got cold feet and said he only wanted to be with me. Now here we are in the present, having the same conversation we were having a few months ago. He wants to have sex with other girls, but he wants to be with me for forever, blah blah blah. I was so sure that a hall pass was a good idea a few months ago but when he said he didn't want it, I felt like a huge weight had been lifted off my shoulder. Im afraid of being compared to another girl who might be prettier or skinnier or better in bed. I'm afraid of losing my boyfriend to some skank. I'm afraid of an innocent one night stand turning into a full blown affair. I've told him about my concerns and he told me that would never happen and I trust him but I can't turn off that negative voice in the back of my head. I can't go to my friends about this because they would just tell me to dump him. But I understand how men think and I know that this isn't about me, it's just an experience he needs. I just don't want to lose my best friend and the love of my life in the process. Can anyone give me some advice?
Should I give my boyfriend of 2 years a hall pass? Please help?
Post Opinion