Well starting again

After losing 50 lbs last year, I gained it all back in 3 months. So embarrassing and ashamed of myself. Back on the grind yet again. This time with an actual gym and personal trainer. Let's hope for better results. Wedding in June. Need to lose about 65-70 pounds this time. Starting off at 281.1 and down to 272.4 in 5 days. Not a bad start. But I am going this alone and need some support. So any help would be appreciated!!! I entered a 60 day challenge and I really want to help my team win. I am by far the biggest one in my group. A little disappointing, but someone has to be. I just wish it wasn't always me. I am 6'2" so I am already a big man, but to be the heaviest is upsetting. Help would be amazing. Fiancé did not want to join up and so far has been not interested in getting going. I am hoping she gets going soon. I am getting frustrated as I feel like she does not care. Today was my weigh in and she didn't even want to get out of bed to support me. I won't lie, it did hurt my feelings. But regardless I am in this to win it and get myself in a more healthy lifestyle for years to come. I need this. I need to do this. I need to help my team.