Actually you would be better served to look up Inhibited Male Orgasm (IMO) it can have psychological or physical (usually cardiovascular) implications.
Assuming you are reaching orgasm, your situation would be called anejaculation which you can research, but an appointment with a urologist would be in order due to the several causes of this issue.
It is a form of anorgasmia.Search the word"inability to reach orgasm.the web site will give you the answer to your problem.