How to remove a barnacle

Okay, so, one of my students coined the term "barnacle" to describe a guy who is clingy and won't let go. I thought it was actually a pretty good use of a word, considering I, myself, am dealing with a barnacle that I am attempting to extricate myself from. I, once again, tried to call him back tonight and got his voicemail on his phone. He did call me earlier, so I know he's around and he only uses a cell, so don't know what the deal is, but anyways....

This will sound pathetic - he's a great guy. Funny, great personality, a gentleman, caring, compassionate, intelligent, makes a good living ...etc. However, I am just not comfortable being intimate or touchy-feely with him. It's just not there. I've given it about 4 months - at the urging of numerous friends who thought I was nuts to give up on such a wonderful guy - but it's just not there. Kissing is not enjoyable, cuddling is not fun and I don't feel comfortable. I've narrowed it down to a couple of things (which will sound even more pathetic):

1) He's 13 years older than I am, which is not a problem for me (he's 45) BUT - he looks like he's 50. I feel like I am dating my father and that's just plain wrong.
2) The man can't dress. I swear he has one pair of dirty sneakers that I would use in the yard. He wore them on our first date, and it's the only pair of shoes I've ever seen him wear. Hmm....he makes six figures - buy some nice shoes for goodness sake! Okay - this might clear this little thing up - I am a shoe HOUND. I love shoes - I do. It's one of the things I notice first about guys - petty, stupid, childish - but if you're on a first date - dress to impress, don't look like you just came in from yardwork. That's okay once you "with" someone for a while, but in the getting to know you stage, it's all about impressions.
3) The man has a memory like a sieve. I had to email him my schedule - which, by the way, does NOT normally change - which I mentioned to him in the email. Gist of email - do not call me on nights I have class. I won't answer and I'm too tired to call back later. So, when does he always call and leave a message (at home AND on my cell) - when I am IN CLASS. It's gotten really annoying.
4) His yard looks like *#@!. This is an issue for me - it says-"I don't care about what my house looks like and take no pride in it". Hmmm... I DO take pride in my home and want it to look nice. Working the yard is relaxing to me and I enjoy it and value it - I like my home to look nice and appealing when I come home everyday.
5) I cannot stand his cologne and he wears a gallon of it. BIG turn off. Just can't do it. I'm not sensitive to smells, but I swear it's the same aftershave my dad wears. Yes - fixable, but with all the other things, it just adds up to too much stuff to be fixed.
6) His age and he wants kids - which means if this were to go somewhere, I would probably end up having kids almost immediately, which I don't want to do right now.
7) When I think of what my life would be like in 5 or 10 years, I can't picture him there with me. Big warning sign. A very influential teacher that I had once told me "If you can't see yourself doing something, it's probably not meant to be." I can't see me with him, so I just don't think it's going to happen.

So, some of the reasons above are probably shallow, some are more gut instinct. My gut was telling me this 4 months ago - so I've decided I won't ask my friends for dating advice any more. If the gut says no, it means no and then I back out before I have a permanent thing attached to my phone(s) that I cannot unglue. Did you know that they make denture glue from secretions from barnacles? Yes, they are that strong and stay put even when you dump a ton of water on them. I need to scrape this one off!!!