Can I make an assumption that you watch a lot of anime?
Your infatuation with the toy might come from that, your way to connect with those 2D characters which now your toy represents. Your first sexual experience is with the toy and every time you orgasm your brain will connect that feeling to the toy. Which is how we bond with our sexual partners.
Now, even though you're not hurting anyone with your sexual endeavour (you're bonded with the toy so it's no longer just experimentation you have real feelings) you have to be careful not to hurt yourself, emotionally, in a long run. The toy might get damaged, be discovered by your parents, pop or get deflated during the act and it will hurt. Another, more important thing to think about is the longer you're attached to this toy the more you'll get detached from real girls. And in the future if you're lonely and want to find a girlfriend you might not be able to as human girls will no longer be sexually attractive to you. Many watchers of anime have reported that over time they couldn't feel attracted to anyone or anything that doesn't look like anime women and frankly...not many women do.
The way to circumvent this is trying to find an actual girlfriend while at the same time getting sexual gratification from that toy.
Because trust me once you get it on with an actual human, you'll know it feels much much better than vinyl vagina.
Hi n053aph, it's pretty common for teens your age to be sexually curious and engage in self discovery. You getting an inflatable doll certainly falls in the category of sexual curiosity and now you are discovering what it's like to have it.
What you are feeling is probably the excitement from the novelty of having an inflatable toy that you can "have sex" with. I think the reason you might feel confused about comparing an inflatable girl to a real girl is because you are role playing relationship scenarios where your fantasy inflatable partner does anything you want. As AnneBrooke said earlier, a real girl is unpredictable and you don't know what she is thinking but an inflatable toy is exactly how you make it out to be. That's probably why your fantasy inflatable seems easier and more exciting to you than a real girl. Who doesn't like a little fantasy sometimes?
It sounds like the butterflies in your stomach began after you have been using your toy for a while. Most likely your body has gotten conditioned to anticipate sexual gratification when you see the toy. That anticipation is probably giving you those butterflies in your stomach.
Don't feel pressured to like girls just for the sake of liking them. When you meet the right girl, it will happen naturally. Right now don't worry about anything and enjoy all the feelings and sensations you are getting from your inflatable. Not every teenager gets to have a fantasy inflatable like that. There's absolutely nothing wrong with having fun with your toy and it's not hurting anyone. At the end of the day the only thing that matters is that you are happy.
I think for many teens, exciting is exciting, sexual is sexual and inflatable doll is certainly a lot easier to just 'have' than a girlfriend. So, enjoy your inflatable and recognize that you may want an actual relationship down the road and begin working on the skills to interact, talk to, be kind to someone. This is just new. The shine will dull and eventually you will want someone that feels something back, unlike the doll. Take care and try not to overthink.
So, I guess maybe you'll have to just go with it until reach a point where the toy gets kind of one-dimensional and boring (which might be a while or might not, it depends on the girls you meet, I think). If and when you meet a girl you find really pretty and really interesting, you might find that the toy is not much different than humping a pillow used to be for you.
I'm wondering how you are keeping this toy from your parents, or, do they know you have it? If you think you would be mortified if your mom found it, for example, I'd counsel you to find a really good way to hide it. Most moms wouldn't snoop, but it's possible for a mom to stumble across something. A toy with a vagina is pretty obviously for only one purpose.
As far as the question of getting the butterflies in your stomach when you see the toy, maybe that's from the combo of sexual gratification and total control of the story (kind of like a combo of sex and power) at the moment, giving you a strong reaction. My thought is it will wear off as over time as you realize real people more interesting than toys. Right now, toys are easier, maybe because life as a 16-year-old has its pressures. I suggest just going with the flow without worry or judgement, it sounds like something you'll pass through.