Help please.

I'm not sure if this is the right board to post in, but I honestly don't know what to do and I just want to talk to someone. Anyways a little background about my weightloss journey. I've lost around 40 pounds since I've started. I've been on and off, but I haven't gained, or lost a lot, which I don't really have a problem with because I haven't been really trying. I have a boyfriend, who I adore, we met on xbox. He's pretty overweight, in the 280 range. Since it's a long distance relationship he visited me for a little over a month, last month. I didn't want to seem a buzzkill so I let him pick out the groceries, because I'm pretty sure he didn't want to eat salads for a month straight. Well, that's probably where I messed up, he picked pizza and frozen dinners. We didn't exercise at all when he was over, excluding sexual stuff. Well, one month goes by and I'm still eating mac and cheese and pizza rolls. A few days ago I wanted to change that, since I'm meeting his parents in a month or so. So I did, I went grocery shopping and started to do the 30 day shred again. I just bought batteries for scale a few hours, and guess what I see. 254. I stepped off, thinking it was a mistake, so I did it again, and of course I get the same result. I broke down, and couldn't believe I let myself do this. All that hard work, for nothing. Just seeing that 8 pounds lost in that banner thing makes me tear up. I just don't know what to do. I know I shouldn't give up, but I feel like I'm not strong enough.