Getting too close to my bf

I want someone to understand me here. Each time me and my boyfriend are with each other I get closer to him because I've never in my life (excluding my family as they are eveything to me too but just the love for me and boyfriend here) had anyone to be so close too and to be treated a best friend, soul mate and boyfriend and eveything else into one. We stepped back from seeing each other as much a while ago as we kept having little petty arguments but I don't want to use that as a problem now cause I don't see the harm in when we see each other when I know he will still have time for others. It didn't bother me like it did him. We're getting engaged at Christmas and I cannot wait but I fear I'll get closer to him more and I'll have to push it aside because I know I won't be able to see him anymore but I won't see him any less. I find it so so hard been so close to my boyfriend, I'm so close that I have to physically hide been upset when I say bye to him for the sake of a day or two, is this normal? Like today I said bye and I was close to tears and I didn't want to show it cause I would of looked stupid crying over that so I cried walking home instead just because I won't see him tomorrow or Saturday till Half 10 at night. I'm finding it really hard been really really close to him and holding back on it. He understands to an extent but he likes his own space which I agree on and doesn't want to rush things but neither do I as been engaged soon is our first real step to a future together.