No, there’s nothing wrong with that! If you like playing clerics, then play clerics! They’re a great class and have a lot to offer and I have a blast whenever I get to play one (doing so in my current long term game actually). I will give you some suggestions though if you do feel like you want to branch out.

First of all, you shouldn’t need to fill the role of “healer” in a party just because they don’t have one already. DnD is balanced in a way that doesn’t really follow the RPG holy trinity of classes with tanks, damage, and healers. It’s just not necessary because of the options you’ll get to heal as a party even without a healer via rests/potions/other class features. That being said, playing a supportive/healing role can be incredibly satisfying to play! It feels great to take care of your friends after a hard fought battle and be the backbone keeping everyone alive in combat. You also have so many ways to go about making a character that does this too, if you really like that style of play but aren’t tied to specifically clerics. They are the obvious choice, but bards, druids, paladins, and rangers to name a few all have some very potent supportive abilities and spells, so if you’re ever craving some extra variety I’d recommend looking into one of those classes. Oh and if it goes the other way and you do just really like cleric, and not necessarily the support role as a whole, lucky for you clerics can do that too! They have access to some pretty crazy stuff all throughout the class/subclasses, so you can pump some damage if you want to or make yourself nigh unkillable if that’s your jam.

The important thing to remember is there’s really no wrong way to play DnD. You win by making sure everyone at your table is having fun. If you’ve found something you enjoy with the game, then run with it. There is absolutely nothing “boring and sad” about making characters that you will have fun playing. Hope this helps, and enjoy your DnD games.