I know. I felt that way about someone once, too. We felt like we were totally and completely compatible and connected. We were so in-tune with each other that we would say what the other was thinking before they did. We weren't "lovers," per se, but what we were was unbelievably close. We felt like we had a bond at the mind and at the heart. Both of us felt that way. I eventually moved in with that person, and spent a month there.
Unfortunately, things went horribly wrong. The guy turned out to be constantly sulking and complaining about everything. He was prone to violent outbursts and throwing controllers (he also liked Brawl, but I refused to play him because of this, and when I did, I would intentionally lose). Couple this with the fact that I was going through my own terrible difficulties with coming to terms with myself and not being able to find employment where I was, and the situation was made that much worse, and still echoes to this day. What ended up breaking my heart more than anything when I saw a private conversation he was having about me on AIM with someone from Australia. He said nasty, HORRIBLE things about me - all of which he refused to bring up before when I asked him; and never spoke about to me directly - and showed such cowardice and deceit that my entire view of that person was totally and irreparably shattered at that moment. I still feel the effects of that horrible experience to this day. I mean, the guy even went out of his way to intentionally misspell my name as he was talking about me. It still strikes me to this day what a coward that person was.
Please don't think I'm trying to sound a death knell at your relationship. I'm just saying what can very well happen when you're "sure" about another person. What I think you should do - and I'm being very serious with you about this - is show Ben what I've been saying. Then I want the two of you to sit down to consider it together and talk to each other about it. I want you BOTH to be very familiar with what could happen when you're sure about a relationship, so that you two will act with care and knowledge.