I had the same problem. Notice I said had. Your issue is one of technique. Best advice is what others have said here which is to get a singing instructor.
I recommend a male just because imitation is so critical to the journey of singing better, and it is easier for you to imitate a male than a female voice obviously.
You can also look at Singing Success. I don't have stock in the product, so don't worry. I'm not trying to sell you anything. I just know how frustrated I got over this exact same issue.
Let me offer you this one piece of advice. You are pushing too hard. Pushing too much air. And you are trying to sing your high notes with the full weight of chest voice. It sounds thick and rich. Think instead of lightening your voice to start to take on more of that tenor vocal quality. I'm not saying you are going to become a tenor, but if you start to produce that tonal quality, then you are getting closer to proper technique needed to get higher.
So, instead of pushing, you've got to learn the proper abdominal support and a "held back" feeling of support. Back way off of the push. Use MUCH less air. Don't remove the supported abdominal feeling otherwise you will err on the other side which is to try to control the sound with your neck muscles. Don't do that. Keep a supported feeling but while using less air, see if you can find that lighter sound. Let it crack if it wants to. The cracking is a glimpse of what the lighter sound quality is supposed to be.
So let that happen while you are training. Find a vocal coach who understands this phenomenon. Good luck, and in the mean time, DON'T PUSH. Pushing just forces the thicker, outer muscles of the larynx to take over, because the lighter, thinner edge muscles (the ones that make head voice and tonal brilliance) unable to hold back the air and vibrate to make the sound. You reach a point where you cannot get any higher and the voice just stops. Search for "head voice", and "vocal registration" and terms like that. It's the head voice that you are missing, that will add brilliance even to your low register. Strengthening head voice (the thin edges of the cords) will make the low stuff sound better and will allow you to go higher. It will not turn you into a tenor or take away your low notes.