Look at this situation logically:
Assuming the following are true:
1. The universe is infinitely large
2. There are very particular conditions required for life to exist
3. Technology is hindered by a law of diminishing returns
4. The occurrence of life is extremely rare
5. The chance of a civilization being less advanced than ours is much larger than it being more advanced than ours
Then the following are also true:
1. Aliens exist: this is because in an infinitely large universe, here is an infinite number of planets, which means that every possible type of planet occurs multiple times. This means that there are other planets with life on them in space. However, they are undoubtedly so far away we have absolutely no chance of finding them
2. Aliens will never find us: This is because the technology required to reach Hi-speed interstellar communication is affected by the law of diminishing returns, which means that if it takes 50 years to find out how to go to space, it can take 5000 years to go to interstellar space. Name one civilization that lasted 5000 years. EVER.
3. Aliens Don't have UFOs: Even if aliens found a way to travel interstellar space, and found a way to reach us, and thought it would be a good idea to hide for no obvious reason, and several other things, the drastic differences between alien culture and human culture would be so large, that an alien spaceship will NEVER look like a UFO. And the chance that a UFO makes light is negligible, since I seriously doubt an alien would have eyes.
So basically, everything the OP said is Bullshit.