This is a question that comes up from time to time, how do I find a boyfriend or a girlfriend who will baby me?
Honestly, the answer is usually the same, you can try Fetlife, but it's often a mixed bag, as you yourself have experienced. Fetlife is good because there are a lot of AB/DLs and Caregivers on there and it's also a good way to keep up on Munches and AB/Little events in your local area, but chances are you may or may not find someone to have a longstanding relationship with on there. Making things more difficult with Fetlife is the fact that many Caregivers on there are already taken. Now, my current GF/Mommy initially reached out to me on Fetlife, so it is possible to meet some very sweet, nice people on there who want a companion, a friend, a true love and a forever baby, but they are far and few between.
Another option would be to simply date someone, get to know them and then reveal this side of yourself to them. This worked out for me with my 2nd GF/Mommy and I would say this is the method that most ABs live by. Even though I met my current GF/Mommy on Fetlife, we both stopped frequenting that site pretty quickly, afterwards we just started courting and chatting like any other couple would do when starting out. Often times, there just isn't a substitute for getting to know someone, inside and out
Finally, whether you meet a BF/Daddy or a GF/Mommy, it's important to note that the relationship isn't gonna go anywhere if its one-sided i.e. too much AB time and not enough of anything else. You have to have balance in a relationship, times when you are big together and times when you are Baby and Caregiver. You need to spend time as just a couple as well, to show them how much you appreciate them. Whether with or without AB, all great relationships are built off of trust, balance, give and take.
Best of luck and I certainly hope you meet that special someone someday