Breastfeeding slowly coming to an end :(

My daughter is 5 months old and our breastfeeding journey is near its end. We were told she had a tongue tie at two months, but unfortunately I moved to a different state right after finding out, and our insurance didn’t kick in until awhile after we moved. I was able to exclusively breastfeed her until she was three months old, and then started throwing in some bottles of formula (I couldn’t pump enough to give her bottles breast milk) once the tongue tie seemed to be more of an issue. I’ve been feeding her bottles throughout the day and breastfeeding her at night or whenever she seems to want it, which isn’t extremely often. My milk seems like it is starting to dry up and I AM ABSOLUTELY DEVASTATED!! I HAVE CRIED MULTIPLE TIMES!! I wanted so badly to do it for at least a year. Although I did tell myself to set small goals, so I set one month, three month, six month and one year goals. I’m hoping we make it to her still at least OCCASIONALLY breastfeeding to when she’s six months. Was it this heartbreaking for anyone else? I feel like I’ve failed! Switching her to formula helped her gain a lot of weight though, which she needed, because her weight was in the 25% range up until I added the formula in, and now she’s above 50%. I am still so sad. I love the bond it gave us and I’m sad to think about it being over. Someone please tell me I’m not just being over emotional!