Lift weights a lot like bench, squat, and deadlift each 3 times a week. am i too thin, should i be concerned?

Can't tell: I can not tell you if you are too thin without knowing your height, body weight and body frame. At this point in your life, focus on healthy living- healthy eating, keeping the muscles toned, finding enjoyable forms of cardiovascular exercise, minimizing your risk of injury and staying in a healthy weight range. If I can help, then join my care team at www.healthtap.com/dr-clarkeholmes