Sometimes we have to hit rock bottom before we can make a change. It seems you have hit rock bottom and decided to reach out for help. In the 13 years since you got your ileostomy, many new appliances and accessories have been developed to manage ostomies. Develop a plan, start with Coloplast, ConvaTec, and Hollister. Reach out to each one and let them know you are trying to find an appliance and/or accessories that will help you prevent leaks. Tell them you want to try:
1) Flat as well as convex wafers. For ConvaTec and Hollister, you will also want to try their moldable wafers.
2) Request barrier rings.
3) Request adhesive removal wipes.
4) Request barrier prep wipes.
5) Request odor eliminator sample packets.
6) Request barrier extenders.
7) From Hollister, you can request an ostomy belt.
This will give you a good start and try it all out! While trying the different products, you will begin to better understand your ostomy. You will likely find that there are some products that you like from one manufacturer and other products you prefer to get from a different manufacturer. When requesting the products, the companies will typically want to know what type of ostomy you have, where the ostomy is located, how long you have had the ostomy, what the size of your stoma is, and what the height of your stoma is.
The above things are geared towards your physical needs. Although once you have a handle on the physical aspects of managing your stoma, they also provide some help with your mental weaknesses. Unfortunately, they don't fully address your fear/inhibition/anxiety about seeking out a love mate. For that, it could be helpful to talk to a psychiatrist for counseling and perhaps a prescription for anti-anxiety medication — don't let your hangups get in the way of seeking professional help. You have tried it your way for 13 years and it hasn't worked. Move away from that stasis and begin to live.