Is there other intelligent alien life in our Galaxy? Probably. Given how fast life formed on Earth, there must be millions of other life-bearing planets, and intelligence can’t be that rare, but it might be short-lived.

Are there UFO sightings? Yes, people do see unidentified flying objects. Some of them can be explained, some cannot.

Are the UFOs aliens? I don’t know, I’m a “curious agnostic” on the subject.

There’s a LOT of UFO sightings, and evidence from good observers, including US Navy aviators. The US Air Force continues not to cooperate, and officially denies any sightings exist. The very enthusiastic refusal to look at evidence, aside from Project Blue Book, is suspicious.

It’s technically plausible that someone within 50-ish light years of Earth could have heard our radio, sent a ship here, and use drones or manned ships to observe us without interacting. There could also be many other explanations.

We don’t know, and until the last couple years there was no effort to investigate.