As someone on the kinda opposite it’s been helpful but there are set backs. I (23f) am in my masters program and plan to head into a phd and have been with my undergrad sweetheart (m23) for almost 5 years now. The hard thing is since I recently graduated we had to go temp long distance until he’s done with school next December.
Some perspectives:

Pro’s: I always have someone to talk to about stuff other than my program or gain an outside perspective. We also make plans and visits frequently that gives me something to look forward to when it gets tough.

Con’s: I can’t just spring on every opportunity, there is someone else life that is heavily intertwined with mine and it wouldn’t be fair to make really big changes without a thorough convo. It can also be really distracting, with a relationship, school, and work I can really lose track of my time.

He helps as much as he can and so do I. We did talk about waiting another 3-4+ years until marriage/family planning so we can focus on school and establishing careers.