Failed rep on squat (Need help)
I'm a 18 year old male around 80 kg who began with Starting Strength about a month ago. I have been doing another program earlier (during half a year) but stalled on the main lifts so I decided to switch to Starting Strength. I have been starting with lower weights that I use to lift in hope to milk out the linear progression. I was training yesterday but failed on my squat. It was really heavy and I think my form was worse as well.
I did 3x5 on Squats on 97.5 kg, but couldn't do the last rep on my last set and failed. When I did 95 kg it was "okay" in my opinion so I tried to increase the next time. When I trained on my other program earlier I also stalled on 97.5 kg for 5 reps, and never hit the 100 kgs. I am trying to eat a lot (but don't know if it is "enough) and sleep about 8 hours a day. What should I do next time? Try again with the same weight? Decrease? I rest minimum 5 minutes between the sets if it feels very heavy. The other exercises except squat are so far so good. I feel like I am weak at squats but strong at other exercises such as deadlifts, how is that possible? I made 165 kg deadlifts for 5 reps on my other program but still couldn't do 100 kg squat.
Please help me with some advice! :)