I am sure it is just the initial reaction that you have felt so disturbed. No relationship can be forced upon and can only be successful if both are interested. Remember, friendship does not and is not equivalent to intimacy, while intimacy can develop from friendship. In your case your friend does not want to go beyond and wants to limit it to friendship.
It is always best to have a one to one chat without getting too much emotional and if things do not work out, move on because life cannot be very restrictive and also because each one is entitled to their wishes, desires, needs and decisions. If you are not able to still cope spend time ventilating to a friend, if required meet a counsellor. If still you are not able to cope, you may have to take some medicines prescribed by a psychiatrist.