I'm sure hormones make a difference. Like you I've stuck to LL religiously and some weeks ahev only lost a pound and did cry one week (VERY out of character for me)...so from personal experience this is what I've learned about what felt like crappy losses (but works out as 3.8 ibs average me thinks!);
1) it could be hormes & will catch up!
2) Are you drinking enough water - in hot sweaty weather you need to drink more but dont overdo it!
3) Have you measured yourself? One week I lost 1 ib in weight but lost 3 inches in measurements! NOw how do you reason that eh!!
4) Muscle weighs more than fat so you may have put on muscle which is great cos it burns cals at rest, unlike fat!
5) This process is not jst about weight but about taking control of your eating and that means coping with WHATEVER life throws at you (including bad weight oss weeks

) and doing that is a huge achievement in itself!
6) People do loose different amounts - while gutting that those around you may have lost more (I know how that feels!!) you may have lost more inches! So remember this is your journey
7) If you havent cheated you've achieved a huge amount already so be proud of yourself!
8) It may be your chatterbox trying to get you to eat so tell it to f-off!
Not sure if that helps? Hope it does! Bg hugs for you & hang in there! It IS worth it! For me getting from a size 22/24 to 16 in less than three months was the best feeling EVER & made the agony worth it!