I cheated on my girlfriend and feel great, is it normal?

Okay so I was like all depressed and suicidal for like months, my GF didn't care and I met this really cute 10/10 girl at a bar 3 days ago and I introduced myself and we had sex and I thought I'd feel guilty for cheating on my GF but I've never been happier in my life. I don't give a single fcuk, I feel so happy an energetic, I have so much mooore energy than I know what to do with, I feel like I took extacy and cocaine at the same time. I went surfing yesterday for the first time and hooked up with two other blonde girls. And I bench-pressed 250 pounds just nowww and I still feel so energetic. I feel my heart is beating so fast it's gonna explode any sec. I'm probably gonna go clubbing later today and meet more girls and drink till my liver rots. I've been ignoring all my GF's text's for like a week, I'll probably break up with her when I see her face2face. I don't know why but I've never felt so happy in my life. I just want to drink and party. I feel like superman, is this normal?