Could have won that game, and by a wide margin.
Here are the tie breaking criteria per Wikipedia. We are exactly tied with Copenhagen in 1 through 3, and I assume we can skip number four. We are now one down on them in total goal difference (#5), so we need to score a ton of goals over these next two games (or hope Copenhagen drops any points). This is assuming we win both our remaining games, of course.
Points in head-to-head matches among the tied teams;
Goal difference in head-to-head matches among the tied teams;
Goals scored in head-to-head matches among the tied teams;
If more than two teams were tied, and after applying all head-to-head criteria above, a subset of teams are still tied, all head-to-head criteria above are reapplied exclusively to this subset of teams;
Goal difference in all group matches;
Goals scored in all group matches;
Away goals scored in all group matches;
Wins in all group matches;
Away wins in all group matches;
Disciplinary points (direct red card = 3 points; double yellow card = 3 points; single yellow card = 1 point);
UEFA club coefficient.