Am i over looking this?

So my boyfriend and I have been seeing each other for awhile and then a break over some silly stuff that has now been resolved and we are back together and haven't been apart since. I do really love him but past experiences is making it extremely hard for me to think what we have will last. I've had experiences that led me thinking I was going to have two cats, a snake and flings on the side. However things have changed but sometimes I feel we are moving way too fast, however then I like how fast we are moving because I never like running around a bush but he seems very,very into me. Normally its the girl wanting commitment and talking about forever but he is and I just think he is moving a bit fast.

I want to slow down a bit. I feel overwhelmed I know he has those fluttery feelings where I do but not as strongly I feel as he does. In fact the more we get into these feelings of love and such the more I get really scared. I feel in love but then I feel paralzed by my fears that before I was so comfortable with him and now I feel so worried I'm going to fuck up that I feel like I am being overly careful where before I was throwing caution to the wind now I'm feeling nerveous and worried that if I do or say anything I will seriously screw our relationship up.

Is this normal? How do I get back into being back to being comfortable with him? Also how do I tell him without hurting his feelings?