Like others said, it's hard to give specific advice without knowing specifics.
But generally if you're just lacking motivation you could always try something new.
May that something new be a new kind of RP, or another hobby entirely is completely up to your imagination.
Though at the same time, one must also be careful with RP's and grief.
With two things specifically:
1) One is actually venting, rather than fleeing.
2) One is using the RP to grow and relax, rather than to snowball.
#1 Can be dangerous because suddenly RP's are less of a hobby and more of a compulsion. It starts to become required to simply escape your problems, because one has chosen to flee rather than cope. This can get especially bad where the stress as a result of fleeing builds to the point that even fleeing to RP's doesn't get rid of it, so it follows you regardless.
#2 Can be dangerous because you've taken a hobby and made it another source of stress. Now, tuning into your pain and using it to make good stories? Using it to make obstacles to overcome, to develop better characters? These are great! They add to the plot and indirectly let you practice ways to overcome it through your character... But often people fall for the trap of simply becoming depressed in the RP's instead, probably as a result of basing characters off them themselves and their current state.
It may be blasphemy at a role play forum, but maybe you just need a break from RPing as a whole.
In all seriousness though this does have merit to it.
For example a minimal (say 1-2%) amount of my posting here is actually roleplaying.
The vast majority is just chilling out and socializing with people.
And even then I will sometimes get Writers Block in RPs, or hit days where I just cannot for the life of me think of anything to do.