My boyfriend is quite 'small' - affecting our relationship!

Sorry if this is 'shallow' or what not but it's really bothering me and I'll do my best at explaining my problem so bare with me! :) Basically I had sex with my boyfriend for the first time last night (we're both virgins) and it was pretty terrible. It started off with some foreplay which was quite exciting for us both. He suggested this idea and I went along with it as he seemed quite dominating and forceful. I was submissive and shy which he said he liked so I let him 'get on with it'. After about 15 minutes we were both in our underwear and he wanted to take it further. It seemed like the right time and place to go for it and he was very enthusiastic about our first time but having said that, so was I. So I was naked on the couch and he was standing beside me removing his briefs... His penis was fully erect but it seemed rather small compared to his body. Then again, my boyfriend is tall and quite built so I thought everything was fine. He lay down on the couch and I sat on top of him... I won't go into too much unnecessary detail here but all I can say is that, I hardly felt him inside me. The only mom ents of pleasure I derived from the sex was him moaning and being forceful to me. He was very fast and dominating but I couldn't 'feel' him inside me. After trying out a few positions he came inside me which felt moist and uncomfortable so we stopped. My mood was so low and generally disappointed about the whole thing. Now I estimated his penis at about 5/5.5 inches when erect and normal thickness. I can fit both of my hands around it but I have ridiculously tiny hands so i thought he was quite big at the start. The thought was there but he couldn't deliver. I've not told him he was bad and I don't want to either. I wouldn't dream of destroying the little confidence the poor guy has. Sure, I'll continue having sex with him but I want him to know that he's doing a great job and pleasuring me. How do I pretend he's good when he's not? What is he knows himself that I'm putting on an act. This is what scares me the most. I've also grown to think my boyfriend is ugly. He is quite confident in this photo but really, he's a quiet guy. He buys me random gifts every week which I think is very cute and does spontaneous stuff that always surprises me. He's a really nice guy but I don't think I'm attracted to him anymore. I'm a uni student and I have a part time job at Zara where there's a guy who's also at my uni but is 2 years younger than me. We have a strong friendship connection but I want to take things further with this guy. I would have sex with him but I wouldn't dream of hurting my boyfriend. I feel like crying. It's childish but I feel like I child at the moment.

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