Less than a day goes by...

[Jackalope]

We have some context.  We know Trump met with Comey privately.  It's been reported that Comey has notes indicating Trump pressured him to stop the investigation.  Comey did not end the investigation.  Comey was then fired not long after meeting with Trump.

Only one of those things is not known, and while it cannot be said with certainty that it occurred as reported, it is a wholly plausible explanation given the sequence of events.

What do you suppose they talked about, Trump's golf swing, perhaps?

Plausible explanation.  Sure.  That's a low bar.  It's sort of like the Religious folks.  They see a gap in knowledge, and they can't wait to fill it with all sorts of stuff that justifies their beliefs.  You have a memo that, if given the benefit of the doubt, says “He is a good guy. I hope you can let this go." 

The fact of the matter is that whatever the truth is, it must be coherent with the facts above (we know Trump met with Comey. We know Comey didn't end the investigation. We know Trump fired Comey shortly after. Furthermore, Trump himself has himself said (amongst other things) that "the Russia thing" was part of his rationale for firing Comey.

From there to obstruction of justice to the point of impeachment is such a giant leap.

I suggest you take that matter up with someone who's actually made that claim. My personal position on this is that it has the appearance of impropriety and needs to be investigated outside of the executive branch, along with other matters.