Dont confuse feeling trapped with being trapped.
Well take your word for it, it is true, you are feeling trapped. You are not. The feeling of being trapped is real; the condition of not being trapped is real. Learn to respect the difference.
I am interested in the use of the word intimacy. You raise the issue in your original post saying that you
do want to be intimate. Obviously, you are stating that you want to have an intimate sexual relationship with him.
Sex is my favorite way to express my feelings of intimacy for some people. Most members here will probably agree. However, we can have intimate relationships without being sexual.
I would encourage you to own the reality that you love this guy but also own the reality that you want an intimate relationship with someone that can be expressed sexually. What you want is quite normal. Its odd for people to love one another in a sexual way but to not want to express their love sexually. I suppose if you felt identically, thered be no harm.
But you do not feel identically. Be confident, what you feel is healthy and I think you should expect to have that kind of healthy relationship one day with someone. If this guy is not going to be that guy, maybe its unfortunate, you have been willing to give it a try, if he is not able to make that leap, start preparing yourself for finding someone else and loving another man as much as you love him.
It may take a while. But you have demonstrated an ability to love, an ability to want to be intimate with another, a desire to want to be sexually intimate. That ability isnt going to disappear. Dont reject the person that you love or deny that you have loved him, but do reject the notion that you are ever trapped by mere circumstances.
One final note, I think its peculiar that someone could think they are gay and simultaneously think they are asexual. I know that men can experience asexual love for one another, but that is not being gay.