TL;DR: Unless your move was marked as "Mistake" or "Blunder" with the significant material loss, you should not worry much about that.
I don't mean you have to ignore everything that computer says, but there are different ways to play chess, and your way may be not as bad as computer thinks. Here are a few points you might want to keep in mind.
The computer analysis is a very time and resource consuming process. What you get on lichess is a bit conservative ("Contempt" parameter is quite low), quick (limited time) assessment of your game, that's supposed to shed the light on the moves where you have lost 0.5 pawn or more. It's deliberately tuned down to avoid risky variants you might be trying to play -- hence the difference in position evaluation.
"We need to go deeper...", once you've got a questionable move as better alternative, you may want to analyse this particular position at full depth. Assuming you're already in analysis window, choose the particular position and move slider to start the analysis on the local computer (see the pic.)
Once the computer analysis has started, you'll see the number of PV lines in the upper right corner about the game notation (PV lines are NOT visible when you just scroll through your game, you have to turn the analysis ON).
Two most important pieces of information you get here are position scores and moves beyond the one played/proposed. The score difference in this case is negligible (less than 0.1 pawn), making top 3 moves approximately equally good, with one of them slightly better than others. Let the analysis run, it usually takes a minute or more, see how the top lines are changing their position and scores.
Once analysis reaches depth 22, it stops. This is considered "deep enough for most purposes". If you want to go deeper, click blue
+ sign next to the "Depth 22/22". Going beyond depth 22 takes quite a time, try to used that on a relatively fast PC, not on your tables or phone, unless you want to wait for hours.
Finally, here are some common patterns:
XX might be not better or worse than move
YY, with the deeper analysis you'll see the scores getting equal.
YY might appear in the variations as the one of the next moves, being an answer to the threat that's not really visible right now.
YY have approximately equal evaluation and constantly change places in the