Ah, ok, I remember you. Serves me right for not checking post history like I usually do.
Dude, buy a scale ASAP. In your thread two months ago, I literally said: "You're going to need to figure out a way to weigh-in once a week. That's the only way you'll objectively know if you're moving in the right direction." I stand by that.
Back in December, you were "5'7"-5'8", 141-145 pounds". In January, we never got an actual update. So since you haven't been consistently tracking your weight, I don't know how you can say your "gains slowed way down." It sounds like you've gained almost 9 pounds total in 6 months of training, if I followed everything right. That's not terrible, but for a light, younger guy (I forget how old you are), you could certainly see more progress if you simply bump up the food.
Gooch brought up a solid point. If you're carrying some fat already, pictures can definitely be misleading. I think you've said you're still/always pretty lean though, so it's tough to tell without seeing the pictures. If we're not going to see what you actually look like, then we need concrete numbers from the scale, but we don't have those either.
Truth worth repeating.