“Believing” – When considering your health it is proper to speak to a doctor and/or dietitian on a proper diet plan to lose weight to be in a healthier state. This of course includes daily exercise.
However, in regards to looks and shidduchim a different hashkafa must be in place. I agree with the others that attitude about oneself is most important. Beyond that you need to focus on three facts.
1) Zivug – “your zivug was predetermined before you were born”. (Use this as an affirmation and don’t explore this concept beyond this. It will only get you confused.)
2) Less Offers – The odds are you will receive less offers, but that is not necessarily a bad thing. After all, think about how the next girl (who’s skinny) feels after each shidduch when she’s told “she just not the one I’m looking for”. Better to have been offered only 3 shiddachs and proposed to by the third then having gone out with over 50 guys and been rejected by more than half of them.
3) Good Guys – I’m sorry to say, but MANY boys today are VERY shallow! They are looking for the wrong things in a girl and this has a bad affect on their married later on in life. Imagine how a woman feels after her “bum of a husband” divorces her because after 4 labors her body isn’t what it used to be and he’s lost interest in her!
If a guy is willing to go out with you regardless of your size, then that means that he most likely is focusing on the RIGHT things to look for in a girl. He’s clearly someone with right hashgafas and most likely a great guy to be around! Another advantage is you won’t need to constantly worry that your husband will lose interest in you if you gain a little weight (unlike many other girls that do worry). He will always find you attractive. Also, all in all, your chances of end up with a strong and happy marriage is much higher than your skinny counterparts. So focus on the positives and ignore the advice of well meaning ignorant people.
BTW – last week I was at a wedding of a Kallah that was heavy set. I now the Chason’s side and they are exceptional people! Lucky girl!
Bottom line – You will get married! Don’t worry!