How do I break up with a guy I care for but who is on an emotional see saw - pulling away one moment & then...

I've been seeing this guy 4 about a month and 1/2. Things started very quickly but we clicked together like 2 puzzle pieces. It was amazing. Emotional feelings are starting to flourish & then 1 day he says, "I'm starting to fall for you." I'm going out of my mind about how incredible this whole thing is... I later ask him if I can consider him my boyfriend & he shifts gears and puts on the breaks. He then doesn't C or call me 4 almost a week. After that period I start to C less and less of him & when I do it's either very loving and sweet - endearing -I can feel his warmth for me-& he misses or he's a partial "****." I've finally decided acknowledged that this guy just isn't ready & this ultimately will never really be despite my hopes & his small attempts at opening up. So, seriously what's the best, kindest (least dramatic) way of breaking up. I decided to make the break because my heart was beginning to literally hurt over this & I felt like i was about 2 get lost in this