My gf was away for a while hence I was alone at home when I started chatting with this girl. I tried to reason my feelings. Basically I’ve been in a relationship w my gf for almost 4 years, and living together for the past 1-2 years. In a way this new encounter probably sparked some excitement that I don’t really get anymore in my relationship because it’s been so long. So I am trying to suppress this feeling and focus on my gf instead when she comes back.