I used to think gemini's were supposed to be great communicators too, but that isn't necessarily true. What they are really great at is having their minds racing with a million different thoughts all the time, and the thoughts are often opposite to each other. People tend to see them as good communicators because their racing brain often results in them talking a lot, but it doesn't necessarily mean they are able to communicate with others in a meaningful way. That's something they have to learn and it can be especially hard for them. Knowing gemini's, it's completely possible that he himself doesn't even understand how he feels about you and that's why he's avoiding the subject when you ask him. But that doesn't make what he's doing okay.
From what it sounds like he knows exactly how you feel and that you're distressed, but he's repeatedly shown he doesn't care and that's not fair to you. Could be because he's confused about his own emotions, but whatever he's feeling or thinking about you, he still owes it to you to talk it out with you. That's great that he likes that you try to understand how he thinks, but everybody desires to feel understood in a relationship, and he's not lifting a finger to help you feel understood, in fact he's completely ignoring you. You'll find that the ability and desire to understand others like that is a gift of scorpio, and many people will cherish that in you. There's no reason to waste it on someone who wouldn't consider doing the same for you.
Sorry to sound so disapproving of your boyfriend, obviously I don't know him personally or how things really are. But I've learned to be very, very wary of men who have stories like "All my girlfriends in the past had x negative attribute (overreactive, clingy, crazy etc) I'm so glad you're not like that." Yeah bullshit dude. You have to look at the common denominator - him. If all his girlfriends in the past used to "blow up at him for no reason" it's less likely all his girlfriends were crazy and more likely he just isn't able to deal with general relationship issues when they arise. It's much easier to believe all the girls in your life overreact to everything you do than to actually consider whether you might be doing something inconsiderate, like what he's doing right now. I wouldn't be surprised if you act more than mildly concerned about this situation, you're just going to be another one of his girlfriends who "blows up on him" and that just really isn't fair. Kinda gone off on a rant here but I've seen it happen so many times. I'm not trying to tell you you need to break up with him or anything, but really be aware of your desires and of the respect you deserve. If he can't find a way to give it to you, there's lots of other people who will.
As for your signs, seems like he has a lot of earth and you have a lot of water which are very compatible with each other, and both your mars are in fire signs, so it makes sense why you'd get along.
Anyway, the kind of women a man will be attracted to will probably be a combination of his moon and venus signs
In a man's chart:
His moon = the kind of woman he's likely to marry (very traditional way of looking at it, doesn't have to happen)
His venus = the kind of women he loves to be around and will spend a lot of time dating, who he gets along with with ease and enjoys the company of. In modern astrology this sign says a lot about who he'll probably marry as well
The bad news is his venus is in taurus. Which is literally the exact opposite of scorpio lol. Both your sun and your venus are in scorpio so you have a very scorpionic nature especially when it comes to dating (which is venus), and he's looking for the exact opposite of that, a more mellow and subdued, down to earth, laid back, pretty much never gets upset with anything or cares to look into anything too deeply kind of personality. Which you might have trouble living up to. Not that you should take that seriously - some of the most amazing relationships have been between people who's charts are totally incompatible. Just something to think about.
Also, I don't know if you care but the kind of man you'd be most compatible with might have a sagittarius/scorpio nature (your mars and sun represent what kind of guys you like to date/marry). He'd be looking for someone to have a deep emotional connection with who wants to have one with him. He'd also be more focused on the grand scheme of things, have big notions, and be more philosophical, rather than more self-focused like I'm guessing this guy is with his leo mars.
Whatever happens I wish you the best of luck