Forest had the lead through Morgan Gibbs-White before Ismaila Sarr converted from the spot at halftime. Forest also had Neco Williams sent off from the incident.
Glasner told Sky Sports: "I'm really pleased with the first-half, especially the reaction after going 1-0 down.
"We played a fantastic first-half. We controlled the game for the first 10-15 minutes in the second-half but then we lost our nerve.
"I could see the effort and I learned to respect the point when I first came here (to the Premier League)."
Glasner also reflected" "I have mixed feelings. Even before the goal we created two big chances, so credit to the players because we played really well in the first-half.
"We deserved the equaliser. Everyone wanted to take responsibility in the second-half but we took wrong decisions. But I don't want to blame anybody, the reason for this is our psychological situation.
"How I have seen us playing, particularly in the first-half, gives me a lot of confidence for the rest of the season. I love this group because they deal with the situation. They never lost their focus.
"We wanted it, but perhaps we wanted it too much, and we lost a little bit of structure. We did create, we had three or four great crosses, but no-one was on the end of them."