How can i expose myself to the innocent public with my belly getting bigger by the day.
How about lunch times or during the day ? Swimming really is very good for you and the water adds a great support. They may have some fitness water classes at the pool and lets face it, most people are there because they are overweight.
I think setting a goal will also help, giving you something to strive for. You could also get the worst picture of you so far or take a couple of shirtless photos now (front and side) and put them in the bathroom or on the fridge as reminders that this is the worst you want to be. Use the photos as reminders everytime you have a craving for bad food or a desire not to go out to exercise.
Diet..... yep please work out a detailed list as it will make advice more accurate. Meat is fine if it is lean meat. White meat is better (chicken / turkey) without skin. Fish is also great and red meat is ok in moderation as long as it is a lean cut. Grill or oven cook (raised slightly up to let fat drip off) rather than frying if possible. Change the bread to wholemeal bread if you haven't already. White bread is full of sugar and other nasties that taste great but pile on the calories. Eggs and tuna are also good (seperatly or together

. Read the labels and count the calories you are eating. Aim for a high protein, low carb and good fats diet. Keep to around 2000 calories and weight will slowly come off. Add some exercise and it will come off faster. No to your week point....... 4-5 bottles of wine a week. Ok so 5 bottles over 7 days is 0.7 bottles a day. Red wine averages 500KCals so * 0.7 = approx 357Kcals a day. This is just under the number of calories you would get from drinking a litre of coke every day. It really needs to be cur back if you seriously want to loose weight. How about trying to work back to a bootle a week for now. UK recommendation is 3-4 units / day with a half glass (175ml) of red wine being around 2.3 units depending on strength.
Exercise......
I understand your reluctance to go out for a number of reasons. I went swimming for the first time with my son in 3 months because I am happier with my shape now.......still some way to go though.
You really need to get a base level of fitness going before plowing in to more exercise or as you saw, your BP will sky rocket. Walking will help raise that level of fitness. Climbing stairs will also help but will be much more taxing.
For more motivation look
here. Some stunning transformations there from some very overweight guys to very fit people. Note the amount of time for the transformations usually range from 1 year + for big weight loss. Prepair for the long haul but it will be very much worth it in the end. Anyone who made a very large transformation in much less time either were loosing weight outside of the recommended guidelines or were 'chemically' helped and not in a normal supplement way.
You started the ball rolling by posting here so lets keep it going. Post a detailed plan of what you currently eat and also your height and weight would be helpfull.
Cheers
RB