[quote=idlehands]
I'm not sure what country you are in and it's understandable that it's hard to find help in form of foodstamps for a young single man but in the US and I'm sure most first world countries, there are food banks and churches willing to feed you. Most cities have them set up in the central part of town for easier access. Also reddit has a few subreddits about frugal living and even places to find financial help. I haven't read them too indepth but on my cruising for funny cat pictures I've seen they exist. I wish I could help more other than to tell you to keep pushing and don't be too proud to ask for help if it means you not starving.
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[2]

Even if you count as an adult there has to be some kind of welfare system or charity that will aid you. If not a food drive or generous church.
(As much as I speak out against Religion in OT I have grown up around a very kind and caring Church. One that constantly helped feed children and ran youth groups. If there's one like that in your area you should be fine).

That and don't turn away help from your friends and girlfriend. You may not want it, but imagine if the situation was reversed and it was your girlfriend struggling to get by. Would you not want her to come to you for help rather than simply try handling it on her own? 

I know personally if when I had a girlfriend a long time ago if she was ever in such a situation I'd be far more miserable finding out about her situation and that she hid it from me than I would be if she just came to me for help.

Note: That's just a hypothetical, although I have been in a relationship before they never were actually in such a situation.