Youre putting way too much on earthly things, and even though this is one that God /allows/, it is still an earthly desire, and you should avoid putting all your focus on it. Christ did not have a girlfriend. His apostles did not have girlfriends. Many people go without girlfriends daily. It is entirely possible that God may never give you one. Or He may just have different things for you to do now. But it sorta sounds like youre angry that God wont give you something that you dont really even need. Thats really bad. Let go of your desires. We are told that what we tie ourselves to in life, we tie ourselves to in death. Love between two people /does/ die when they do, marriage does end. So tie yourself to God, and not earthly things.
Id say chill out, man
Many of us do not have partners. You can go without, and even if its really causing you suffering, God tells us that He blesses those who endure in His name. He knows what you need, and tells us He does not answer requests made for self gain. You are better off focusing on God than happiness in this life by /far/. Keep in mind /maaany/ Christians in our world dont even get to have a home, daily food, or even peace and comfort. Remember whats important, God. Not earthly desires :3